AP Chemistry
Practice Exam
®
From the 2015 Administration
NOTE: This is a modified version of the 2015 AP Chemistry Exam.
This Practice Exam is provided by the College Board for AP Exam
preparation. Teachers are permitted to download the materials and
make copies to use with their students in a classroom setting only.
To maintain the security of this exam, teachers should collect all
materials after their administration and keep them in a secure location.
Further distribution of
these materials outside of the secure College Board site disadvantages
teachers who rely on uncirculated questions for classroom testing.
Any additional distribution is in violation of the College Board’s
copyright policies and may result in the termination of Practice Exam
access for your school as well as the removal of access to other online
services such as the AP Teacher Community and Online Score Reports.
Exam Instructions
Student Answer Sheet for the Multiple-Choice Section
Section I: Multiple-Choice Questions
Section II: Free-Response Questions
Multiple-Choice Answer Key
Free-Response Scoring Guidelines
Scoring Worksheet
Note: This publication shows the page numbers that appeared in
the
book and in the actual exam.
This publication was not repaginated to begin with page 1.
© 2015 The College Board. College Board, Advanced Placement Program, AP, SAT and the acorn logo are
registered trademarks of the College Board. All other products and services may be trademarks of their
respective owners. Permission to use copyrighted College Board materials may be requested online at:
www.collegeboard.com/inquiry/cbpermit.html.
The following contains instructions taken from
the
book.
AP® Chemistry Exam
Regularly Scheduled Exam Date: Monday morning, May 4, 2015
Late-Testing Exam Date: ursday a ernoon, May 21, 2015
Section I Total Time: 1 hr. 30 min. Section II Total Time: 1 hr. 45 min.
Section I
Section II
Total Time: 1 hour 30 minutes
Calculator not permitted
Percent of Total Score: 50%
Writing Instrument: Pencil required
Number of Questions: 60*
Total Time: 1 hour 45 minutes
Calculators allowed for all of Section II
Percent of Total Score: 50%
Writing Instrument: Either pencil or pen
with black or dark blue ink
Number of Questions: 7
*The number of questions may vary slightly
depending on the form of the exam.
(3 ten-point and 4 four-point
questions; 105 minutes)
What Proctors Need to Bring to This Exam
•
•
•
•
•
•
•
Exam packets
Answer sheets
AP Student Packs
2014-15 AP Coordinator’s Manual
is book — AP Exam Instructions
AP Exam Seating Chart template(s)
School Code and Home-School/SelfStudy Codes
• Extra calculators
• Pencil sharpener
• Container for students’ electronic
devices (if needed)
• Extra No. 2 pencils with erasers
• Extra pens with black or dark blue ink
• Extra paper
• Stapler
• Watch
• Signs for the door to the testing room
– “Exam in Progress”
– “Cell phones are prohibited in the
testing room”
Note: Tables of equations and constants are provided in the exam booklets for both sections of
the exam.
Students are not allowed to use calculators in Section I of the AP Chemistry Exam. However,
students are permitted to use four-function, scienti c, or graphing calculators to answer
questions in Section II. Before starting the exam administration, make sure that each student has
an appropriate calculator and that any student with a graphing calculator has a model from the
approved list on page 46 of the 2014-15 AP Coordinator’s Manual. See pages 43–46 of the
2014 -15 AP Coordinator’s Manual for more information. If a student does not have an appropriate
calculator or has a graphing calculator not on the approved list, you may provide one from your
supply. If the student does not want to use the calculator you provide, or does not want to use a
calculator at all, he or she must hand copy, date, and sign the release statement on page 44 of the
2014 -15 AP Coordinator’s Manual.
42
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
AP Exam Instructions
During the administration of Section II students may have no more than two calculators on
their desks. Calculators may not be shared. Calculator memories do not need to be cleared
before or a er the exam. Students with Hewlett-Packard 48–50 Series and Casio FX-9860
graphing calculators may use cards designed for use with these calculators. Proctors should make
sure infrared ports (Hewlett-Packard) are not facing each other. Since graphing calculators
can be used to store data, including text, proctors should monitor that students are using
their calculators appropriately. Attempts by students to use the calculator to remove exam
questions and/or answers from the room may result in the cancellation of AP Exam scores.
Students will be allowed to use the table of equations and constants on both sections of the exam.
SECTION I: Multiple Choice
!
Do not begin the exam instructions below until you have completed the appropriate
General Instructions for your group.
Make sure you begin the exam at the designated time. Remember: You must complete a seating
chart for this exam. See pages 279–280 for a seating chart template and instructions. See the
2014-15 AP Coordinator’s Manual for exam seating requirements (pages 48–50, 88).
If you are giving the regularly scheduled exam, say:
It is Monday morning, May 4, and you will be taking the AP Chemistry Exam.
If you are giving the alternate exam for late testing, say:
It is Thursday afternoon, May 21, and you will be taking the AP Chemistry Exam.
In a moment, you will open the packet that contains your exam materials.
By opening this packet, you agree to all of the AP Program’s policies and
procedures outlined in the 2014-15 Bulletin for AP Students and Parents. You
may now remove the shrinkwrap from your exam packet and take out the
Section I booklet, but do not open the booklet or the shrinkwrapped Section II
materials. Put the white seals aside. . . .
Carefully remove the AP Exam label found near the top left of your exam
booklet cover. Now place it on page 1 of your answer sheet on the light blue
box near the top right-hand corner that reads “AP Exam Label.”
Read the statements on the front cover of Section I and look up
when you have finished. . . .
Sign your name, and write today’s date. Look up when you
have finished. . . .
Now print your full legal name where indicated. Are there any questions? . . .
Turn to the back cover and read it completely. Look up when you
have finished. . . .
43
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
CHEMISTRY
If students accidentally place the exam label in the space for the number label or vice versa, advise
them to leave the labels in place. ey should not try to remove the label; their exam will be
processed correctly.
Chemistry
Are there any questions? . . .
You will now take the multiple-choice portion of the exam. You should have
in front of you the multiple-choice booklet and your answer sheet. You may
never discuss these specific multiple-choice questions at any time in any form
with anyone, including your teacher and other students. If you disclose these
questions through any means, your AP Exam score will be canceled. . . .
You must complete the answer sheet using a No. 2 pencil only. Mark all of
your responses beginning on page 2 of your answer sheet, one response per
question. Completely fill in the circles. If you need to erase, do so carefully
and completely. No credit will be given for anything written in the exam
booklet. Scratch paper is not allowed, but you may use the margins or
any blank space in the exam booklet for scratch work. Calculators are not
allowed for this section. Please put your calculators under your chair. Are
there any questions? . . .
You have 1 hour and 30 minutes for this section. Open your Section I booklet
and begin.
Note Start Time here
. Note Stop Time here
. Check that students are
marking their answers in pencil on their answer sheets, and that they are not looking at their
shrinkwrapped Section II booklets. A er 1 hour and 20 minutes, say:
There are 10 minutes remaining.
A er 10 minutes, say:
Stop working. Close your booklet and put your answer sheet on your desk,
face up. Make sure you have your AP number label and an AP Exam label on
page 1 of your answer sheet. Sit quietly while I collect your answer sheets.
Collect an answer sheet from each student. Check that each answer sheet has an AP number label
and an AP Exam label. A er all answer sheets have been collected, say:
Now you must seal your exam booklet using the white seals you set aside
earlier. Remove the white seals from the backing and press one on each area
of your exam booklet cover marked “PLACE SEAL HERE.” Fold each seal over
the back cover. When you have finished, place the booklet on your desk, face
up. I will now collect your Section I booklet. . . .
Collect a Section I booklet from each student. Check that each student has signed the front cover
of the sealed Section I booklet.
ere is a 10-minute break between Sections I and II. When all Section I materials have been
collected and accounted for and you are ready for the break, say:
Please listen carefully to these instructions before we take a 10-minute
break. All items you placed under your chair at the beginning of this exam
must stay there, and you are not permitted to open or access them in
any way. Leave your shrinkwrapped Section II packet on top of your desk
during the break. You are not allowed to consult teachers, other students,
or textbooks during the break. You may not make phone calls, send text
messages, check email, use a social networking site, or access any electronic
44
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
AP Exam Instructions
or communication device. Remember, you may never discuss the multiplechoice questions at any time in any form with anyone, including your teacher
and other students. If you disclose these questions through any means, your
AP Exam score will be canceled. Are there any questions? . . .
You may begin your break. Testing will resume at
.
SECTION II: Free Response
A er the break, say:
May I have everyone’s attention? Place your Student Pack on your desk. . . .
You may now remove the shrinkwrap from the Section II packet, but do not
open the exam booklet until you are told to do so. . . .
Read the bulleted statements on the front cover of the exam booklet. Look
up when you have finished. . . .
Now place an AP number label on the shaded box. If you don’t have any
AP number labels, write your AP number in the box. Look up when you
have finished. . . .
Read the last statement. . . .
Using your pen, print the first, middle and last initials of your legal name
in the boxes and print today’s date where indicated. This constitutes your
signature and your agreement to the statements on the front cover. . . .
Turn to the back cover and complete Item 1 under “Important Identification
Information.” Print the first two letters of your last name and the first letter
of your first name in the boxes. Look up when you have finished. . . .
In Item 2, print your date of birth in the boxes. . . .
In Item 3, write the school code you printed on the front of your Student
Pack in the boxes. . . .
Read Item 4. . . .
Are there any questions? . . .
While Student Packs are being collected, read the information on the back
cover of the exam booklet. Do not open the exam booklet until you are told to
do so. Look up when you have finished. . . .
Collect the Student Packs.
en say:
Are there any questions? . . .
45
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
CHEMISTRY
I need to collect the Student Pack from anyone who will be taking another
AP Exam. You may keep it only if you are not taking any other AP Exams this
year. If you have no other AP Exams to take, place your Student Pack under
your chair now. . . .
Chemistry
Calculators may be used for Section II. You may get your calculators from
under your chair and place them on your desk. . . .
You have 1 hour and 45 minutes to complete Section II. You are responsible
for pacing yourself, and you may proceed freely from one question to the
next. You must write your answers in the exam booklet using a pen with
black or dark blue ink or a No. 2 pencil. If you use a pencil, be sure that your
writing is dark enough to be easily read. If you need more paper during the
exam, raise your hand. At the top of each extra sheet of paper you use, be
sure to write only your AP number and the number of the question you are
working on. Do not write your name. Are there any questions? . . .
You may begin.
Note Start Time here
. Note Stop Time here
. Proctors should also
make sure that Hewlett-Packard calculators’ infrared ports are not facing each other and that
students are not sharing calculators. A er 1 hour and 35 minutes, say:
There are 10 minutes remaining.
A er 10 minutes, say:
Stop working and close your exam booklet. Place it on your desk, face up. . . .
If any students used extra paper for the free-response section, have those students staple the extra
sheet(s) to the rst page corresponding to that question in their exam booklets. Complete an
Incident Report and include any exam booklets with extra sheets of paper in an Incident Report
return envelope (see page 57 of the AP Coordinator’s Manual for details). en say:
Remain in your seat, without talking, while the exam materials
are collected. . . .
Collect a Section II booklet from each student. Check for the following:
• Exam booklet front cover: e student placed an AP number label on the shaded box, and
printed his or her initials and today’s date.
• Exam booklet back cover: e student completed the “Important Identi cation
Information” area.
When all exam materials have been collected and accounted for, return to students any electronic
devices you may have collected before the start of the exam.
If you are giving the regularly scheduled exam, say:
You may not discuss or share these specific free-response questions with anyone
unless they are released on the College Board website in about two days. Your AP
Exam score results will be available online in July.
If you are giving the alternate exam for late testing, say:
None of the questions in this exam may ever be discussed or shared in any way
at any time. Your AP Exam score results will be available online in July.
46
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
AP Exam Instructions
If any students completed the AP number card at the beginning of this exam, say:
Please remember to take your AP number card with you. You will need the
information on this card to view your scores and order AP score reporting
services online.
en say:
You are now dismissed.
All exam materials must be placed in secure storage until they are returned to the AP Program
a er your school’s last administration. Before storing materials, check the “School Use Only”
section on page 1 of the answer sheet and:
• Fill in the appropriate section number circle in order to access a separate AP
Instructional Planning Report (for regularly scheduled exams only) or subject
score roster at the class section or teacher level. See “Post-Exam Activities” in the
2014 -15 AP Coordinator’s Manual.
• Check your list of students who are eligible for fee reductions and ll in the
appropriate circle on their registration answer sheets.
Be sure to give the completed seating chart to the AP Coordinator. Schools must retain seating
charts for at least six months (unless the state or district requires that they be retained for a longer
period of time). Schools should not return any seating charts in their exam shipments unless they
are required as part of an Incident Report.
CHEMISTRY
47
© 2015 The College Board. Visit the College Board on the Web: www.collegeboard.org.
Use this section to capture student responses. (Note that the following
answer sheet is a sample, and may differ from one used in an actual exam.)
(from Student Pack)
AP Number Label
M
N
J
K
L
M
J
K
L
M
S
T
P
Q
R
S
P
Q
R
S
Z
–
V
W
X
Y
Z
–
V
W
X
Y
Z
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
779934
H. AP EXAM I AM
TAKING USING THIS
ANSWER SHEET
Y
X
W
V
U
T
U
T
U
R
Q
P
O
N
O
N
O
L
K
J
I
H
G
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
Exam Name:
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
Q3914/1-4
1
2
3
4
Section Number
5
6
SCHOOL USE ONLY
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
7
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
8
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
9
B
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
Form:
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
Form Code:
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
1
Option 1
2
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Option 2
Fee Reduction Granted
–
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
I
G
F
E
D
C
B
A
H
G
F
E
D
C
B
A
I
G
F
E
D
C
B
A
H
G
F
E
D
C
B
A
G
F
E
D
C
B
A
G
F
E
D
C
B
A
F
E
D
C
B
A
F
E
D
C
B
A
E
D
C
B
A
E
D
C
B
A
D
C
B
A
D
C
B
A
C
B
A
C
B
A
B
A
B
A
A
A
A
A
A
Legal First Name — First 12 Letters
Date
Legal Last Name — First 15 Letters
A
Omit apostrophes, Jr., II.
B. LEGAL NAME
A
Sign your legal name as it will appear on your college applications.
A. SIGNATURE
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
MI
2
2
9
8
7
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
9
8
7
8
6
5
5
7
4
4
6
3
2
1
0
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
L. SOCIAL SECURITY
NUMBER (Optional)
INTERNATIONAL PHONE
0
0
I. AREA CODE AND
PHONE NUMBER
9
8
7
6
5
5
6
4
4
3
1
1
3
0
0
C. YOUR AP NUMBER
B123456789T
USE NO. 2 PENCIL ONLY
To maintain the security of the exam and the validity of my AP score, I will allow no one else to see the multiple-choice questions. I will
seal the multiple-choice booklet when asked to do so, and I will not discuss these questions with anyone at any time after completing the
section. I am aware of and agree to the AP Program’s policies and procedures as outlined in the 2014-15 Bulletin for AP Students and
Parents, including using testing accommodations (e.g., extended time, computer, etc.) only if I have been preapproved by College Board
Services for Students with Disabilities.
COMPLETE THIS AREA AT EVERY EXAM.
Answer Sheet
2015
104246-00657• UNLWEB315
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
1
0
9
8
7
6
5
4
3
2
1
0
Month
11
10
9
8
7
5
4
3
2
1
12
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
SCHOOL CODE
9
8
7
6
5
4
3
2
1
0
Country
State
City
School Name
9
9
8
7
8
6
5
5
7
4
4
6
3
2
1
0
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
COLLEGE CODE
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
Country
State
City
College Name
Using the college code listed in the
AP Student Pack, indicate the ONE
college that you want to receive your
AP score report.
M. COLLEGE TO RECEIVE YOUR
AP SCORE REPORT
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
2
2
9
8
7
9
8
7
6
5
5
6
4
4
3
1
1
3
0
0
2
1
0
9
8
7
6
5
4
9
8
7
6
5
4
3
2
1
0
No longer in
high school
12th
11th
10th
9th
Not yet in 9th grade
9
8
7
6
5
4
3
2
1
0
Year
N. CURRENT
GRADE LEVEL
Dec
Nov
Oct
Sep
Aug
Jul
Jun
3
2
1
0
Day
May 3
Apr
Mar
Feb
Jan
Month
9
8
7
6
5
4
3
2
1
0
G. ONLINE
PROVIDER
CODE
PAGE 1
K. DATE OF BIRTH
9
8
7
6
5
4
3
2
1
0
S
6
AM PM
COMPLETE THIS AREA ONLY ONCE.
9
8
7
6
5
4
3
2
1
0
F. MULTIPLE-CHOICE BOOKLET
SERIAL NUMBER
E. EXAM
START
TIME
J. SCHOOL YOU ATTEND
3
2
1
0
Day
D. EXAM DATE
(from Section I Booklet)
AP Exam Label
PAGE 2
COMPLETE THIS AREA AT EACH EXAM (IF APPLICABLE).
O. SURVEY QUESTIONS — Answer the survey questions in the AP Student Pack. Do not put responses to exam questions in this section.
1
A
B
C
D
E
F
G
H
I
4
A
B
C
D
E
F
G
H
I
7
A
B
C
D
E
F
G
H
I
2
A
B
C
D
E
F
G
H
I
5
A
B
C
D
E
F
G
H
I
8
A
B
C
D
E
F
G
H
I
3
A
B
C
D
E
F
G
H
I
6
A
B
C
D
E
F
G
H
I
9
A
B
C
D
E
F
G
H
I
P. LANGUAGE — Do not complete this section unless instructed to do so.
If this answer sheet is for the French Language and Culture, German Language and Culture, Italian Language and Culture, Spanish Language
and Culture, or Spanish Literature and Culture Exam, please answer the following questions. Your responses will not affect your score.
1. Have you lived or studied for one month or more in a country where the language of the
exam you are now taking is spoken?
Yes
2. Do you regularly speak or hear the language at home?
No
Yes
No
QUESTIONS 1–75
Indicate your answers to the exam questions in this section (pages 2 and 3). Mark only one response per question
for Questions 1 through 120. If a question has only four answer options, do not mark option E. Answers written in
the multiple-choice booklet will not be scored.
EXAMPLES OF
INCOMPLETE MARKS
COMPLETE MARK
A
B
C
D
A
B
C
D
You must use a No. 2 pencil and marks must be complete. Do not use a mechanical pencil. It
is very important that you ll in the entire circle darkly and completely. If you change your response,
erase as completely as possible. Incomplete marks or erasures may affect your score.
1
A
B
C
D
E
26
A
B
C
D
E
51
A
B
C
D
E
2
A
B
C
D
E
27
A
B
C
D
E
52
A
B
C
D
E
3
A
B
C
D
E
28
A
B
C
D
E
53
A
B
C
D
E
4
A
B
C
D
E
29
A
B
C
D
E
54
A
B
C
D
E
5
A
B
C
D
E
30
A
B
C
D
E
55
A
B
C
D
E
6
A
B
C
D
E
31
A
B
C
D
E
56
A
B
C
D
E
7
A
B
C
D
E
32
A
B
C
D
E
57
A
B
C
D
E
8
A
B
C
D
E
33
A
B
C
D
E
58
A
B
C
D
E
9
A
B
C
D
E
34
A
B
C
D
E
59
A
B
C
D
E
10
A
B
C
D
E
35
A
B
C
D
E
60
A
B
C
D
E
11
A
B
C
D
E
36
A
B
C
D
E
61
A
B
C
D
E
12
A
B
C
D
E
37
A
B
C
D
E
62
A
B
C
D
E
13
A
B
C
D
E
38
A
B
C
D
E
63
A
B
C
D
E
14
A
B
C
D
E
39
A
B
C
D
E
64
A
B
C
D
E
15
A
B
C
D
E
40
A
B
C
D
E
65
A
B
C
D
E
16
A
B
C
D
E
41
A
B
C
D
E
66
A
B
C
D
E
17
A
B
C
D
E
42
A
B
C
D
E
67
A
B
C
D
E
18
A
B
C
D
E
43
A
B
C
D
E
68
A
B
C
D
E
19
A
B
C
D
E
44
A
B
C
D
E
69
A
B
C
D
E
20
A
B
C
D
E
45
A
B
C
D
E
70
A
B
C
D
E
21
A
B
C
D
E
46
A
B
C
D
E
71
A
B
C
D
E
22
A
B
C
D
E
47
A
B
C
D
E
72
A
B
C
D
E
23
A
B
C
D
E
48
A
B
C
D
E
73
A
B
C
D
E
24
A
B
C
D
E
49
A
B
C
D
E
74
A
B
C
D
E
25
A
B
C
D
E
50
A
B
C
D
E
75
A
B
C
D
E
ETS USE ONLY
Exam
Exam
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
SELECTED MEDIA EXAMS
R
W
O
OTHER EXAMS
PT02
TOTAL
PT03
Subscore (if applicable)
PT04
Subscore (if applicable)
DO NOT WRITE IN THIS AREA
R
W
O
PAGE 3
QUESTIONS 76–120
Be sure each mark is dark and completely lls the circle. If a question has only four answer options, do not mark option E.
76
A
B
C
D
E
91
A
B
C
D
E
106
A
B
C
D
E
77
A
B
C
D
E
92
A
B
C
D
E
107
A
B
C
D
E
78
A
B
C
D
E
93
A
B
C
D
E
108
A
B
C
D
E
79
A
B
C
D
E
94
A
B
C
D
E
109
A
B
C
D
E
80
A
B
C
D
E
95
A
B
C
D
E
110
A
B
C
D
E
81
A
B
C
D
E
96
A
B
C
D
E
111
A
B
C
D
E
82
A
B
C
D
E
97
A
B
C
D
E
112
A
B
C
D
E
83
A
B
C
D
E
98
A
B
C
D
E
113
A
B
C
D
E
84
A
B
C
D
E
99
A
B
C
D
E
114
A
B
C
D
E
85
A
B
C
D
E
100
A
B
C
D
E
115
A
B
C
D
E
86
A
B
C
D
E
101
A
B
C
D
E
116
A
B
C
D
E
87
A
B
C
D
E
102
A
B
C
D
E
117
A
B
C
D
E
88
A
B
C
D
E
103
A
B
C
D
E
118
A
B
C
D
E
89
A
B
C
D
E
104
A
B
C
D
E
119
A
B
C
D
E
90
A
B
C
D
E
105
A
B
C
D
E
120
A
B
C
D
E
QUESTIONS 121–126
For Students Taking AP Biology
Write your answer in the boxes at the top of the griddable area and ll in the corresponding circles.
Mark only one circle in any column. You will receive credit only if the circles are lled in correctly.
121
–
122
/
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
4
4
4
5
5
6
123
/
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
9
9
9
9
.
124
/
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
8
9
9
9
9
9
–
.
125
/
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
8
9
9
9
9
9
–
.
126
/
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
8
9
9
9
9
9
–
.
/
/
.
.
.
.
0
0
0
0
1
1
1
1
1
2
2
2
2
2
3
3
3
3
3
3
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
9
–
.
–
QUESTIONS 131–142
For Students Taking AP Physics 1 or AP Physics 2
Mark two responses per question. You will receive credit only if both correct responses are selected.
131
A
B
C
D
135
A
B
C
D
139
A
B
C
D
132
A
B
C
D
136
A
B
C
D
140
A
B
C
D
133
A
B
C
D
137
A
B
C
D
141
A
B
C
D
134
A
B
C
D
138
A
B
C
D
142
A
B
C
D
© 2014 The College Board. College Board, AP, Student Search Service and the acorn logo are registered trademarks of the College Board.
DO NOT WRITE IN THIS AREA
.
/
COMPLETE THIS AREA ONLY ONCE.
9
/
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9
/
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
L
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
T. EMAIL ADDRESS
Address
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
J
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
STATE
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
IA
ID
IL
IN
KS
KY
LA
MA
MD
ME
AL
AR
AZ
CA
CO
CT
DC
DE
FL
GA
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
HI
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
AK
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
NV
NM
NJ
NH
NE
ND
NC
MT
MS
MO
MN
MI
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
VA
UT
TX
TN
SD
SC
RI
PA
OR
OK
OH
NY
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
City
B
A
9
8
7
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Country
S. STUDENT IDENTIFIER (Student ID Number)
Other
AP
AE
AA
6
5
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Puerto
Rico
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
4
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
ZIP OR POSTAL CODE
WY
WV
WI
WA
VT
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
State or Province
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
If your address does not t in the spaces provided in Item Q, ll in as
many circles as you can, then ll in the circle in Item R and print the remainder of your address in the spaces provided.
/
9
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
M
L
K
I
H
G
F
E
By providing your email address, you are granting the College Board
permission to use your email in accordance with the policies in the
2014-15 Bulletin for AP Students and Parents.
R. FOR STUDENTS OUTSIDE
THE UNITED STATES ONLY
8
7
6
5
4
3
2
1
0
Z
Y
X
W
V
U
T
S
R
Q
P
O
N
L
M
J
K
I
H
G
F
E
D
C
B
L
M
L
M
L
M
J
K
I
H
G
F
E
D
C
B
J
I
H
G
F
E
D
C
B
A
K
I
H
G
F
E
D
C
B
A
J
I
H
G
F
E
D
C
B
A
K
I
H
G
F
E
D
C
B
A
J
I
H
G
F
E
D
C
B
A
K
I
H
G
F
E
D
C
B
A
I
H
G
F
E
D
C
B
A
I
H
G
F
E
D
C
B
A
I
H
G
F
E
D
C
B
A
H
F
E
D
C
B
A
G
F
E
D
C
B
A
H
F
E
D
C
B
A
G
F
E
D
C
B
A
F
E
D
C
B
A
F
E
D
C
B
A
E
D
C
B
A
E
D
C
B
A
D
B
A
C
B
A
D
B
A
C
B
A
B
A
B
A
A
A
A
A
A
CITY
Use the address abbreviations from your AP Student Pack. Fill in only one circle per column. Indicate a space in your address by leaving a blank box; do not grid that column.
STREET ADDRESS (include street number, street name, apartment number, etc.)
Q. YOUR MAILING ADDRESS
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
0
No
Male
English
English and another language
about the same
Another language
W. WHICH LANGUAGE DO YOU
KNOW BEST?
Female
V. SEX
If you don’t answer and previously chose to
participate in this service, we will continue
providing your information.
Yes
Would you like us to supply your information?
Colleges and scholarship programs may
request your information to inform you of
educational opportunities and nancial aid.
ZIP or Postal Code
Father or male guardian
Mother or female guardian
Graduate or professional degree
Some graduate or professional school
Bachelor’s or four-year degree
Associate or two-year degree
Some college
Vocational or trade school
High school diploma or equivalent
Some high school
If you don’t answer and previously chose to
participate in this Grade
service,school
we will continue
providing your information.
In the rstand
column,
indicateprograms
the highest
level of education
Colleges
scholarship
may
of your parent/guardian.
haveyou
twoofparents/guardians,
request
your informationIftoyou
inform
indicate the opportunities
level of education
your other
educational
and fornancial
aid. parent/
guardian in the second column. In the appropriate column
Would
you like us to supply your information?
for each parent/guardian, indicate whether this is your
mother or female guardian or your father or male guardian.
Y. PARENTAL EDUCATION LEVEL
Other
White
Other Hispanic, Latino or Latin American
Puerto Rican
Mexican or Mexican American
Black or African American
Asian, Asian American or Paci c Islander
American Indian or Alaska Native
X. ETHNICITY/RACE
0
0
COUNTRY
CODE
PAGE 4
U. STUDENT SEARCH SERVICE®
This is the multiple-choice section of the 2015 AP exam.
It includes cover material and other administrative instructions
to help familiarize students with the mechanics of the exam.
(Note that future exams may differ in look from the following content.)
For purposes of test security and/or statistical analysis, some
questions have been removed from the version of the exam
that was administered in 2015. Therefore, the timing indicated
here may not be appropriate for a practice exam.
AP Chemistry Exam
®
2015
SECTION I: Multiple Choice
DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO.
At a Glance
Total Time
1 hour, 30 minutes
Number of Questions
50
Percent of Total Score
50%
Writing Instrument
Pencil required
Electronic Device
None allowed
Instructions
Section I of this exam contains 50 multiple-choice questions. Fill in only the circles for
numbers 1 through 50 on your answer sheet. Pages containing a periodic table and lists
containing equations and constants are also printed in this booklet.
Indicate all of your answers to the multiple-choice questions on the answer sheet. No
credit will be given for anything written in this exam booklet, but you may use the booklet
for notes or scratch work. A er you have decided which of the suggested answers is best,
completely ll in the corresponding circle on the answer sheet.
Because this section o ers only four answer options for each question, do not mark the
(E) answer circle for any question. Give only one answer to each question. If you change
an answer, be sure that the previous mark is erased completely. Here is a sample question
and answer.
Use your time e ectively, working as quickly as you can without losing accuracy. Do not
spend too much time on any one question. Go on to other questions and come back to
the ones you have not answered if you have time. It is not expected that everyone will
know the answers to all of the multiple-choice questions.
Your total score on Section I is based only on the number of questions answered correctly.
Points are not deducted for incorrect answers or unanswered questions.
Form I
Form Code 4LBP4-S
25
-2-






+
-
-
+







-



-




×







−

 

 
D 
-
D 
 
D 
-
D 
 

-
   








CHEMISTRY
Section I
0 Questions
Time—90 minutes
CALCULATORS ARE NOT ALLOWED FOR SECTION I.
Note: For all questions, assume that the temperature is 298 K, the pressure is 1.0 atm, and solutions are aqueous
unless otherwise specified.
Directions: Each of the questions or incomplete statements below is followed by four suggested answers or
completions. Select the one that is best in each case and then fill in the corresponding circle on the answer sheet.
1. A 0.5 mol sample of He(g) and a 0.5 mol sample
of Ne(g) are placed separately in two 10.0 L rigid
containers at 25°C. Each container has a pinhole
opening. Which of the gases, He(g) or Ne(g),
will escape faster through the pinhole and why?
2. The lattice energy of a salt is related to the energy
required to separate the ions. For which of the
following pairs of ions is the energy that is
required to separate the ions largest? (Assume that
the distance between the ions in each pair is equal
to the sum of the ionic radii.)
(A) He(g) will escape faster because the
He(g) atoms are moving at a higher
average speed than the Ne(g) atoms.
(B) Ne(g) will escape faster because its initial
pressure in the container is higher.
(C) Ne(g) will escape faster because the
Ne(g) atoms have a higher average
kinetic energy than the He(g) atoms.
(D) Both gases will escape at the same rate
because the atoms of both gases have
the same average kinetic energy.
(A)
(B)
(C)
(D)
Unauthorized copying or reuse of
any part of this page is illegal.
Na+(g) and Cl−(g)
Cs+(g) and Br−(g)
Mg2+(g) and O2−(g)
Ca2+(g) and O2−(g)
GO ON TO THE NEXT PAGE.
-5-
4. Which of the following diagrams best depicts an
alloy of Ni and B ?
(A)
(B)
3. The mass spectrum of element X is presented
in the diagram above. Based on the spectrum,
which of the following can be concluded about
element X?
(C)
(A) X is a transition metal, and each peak
represents an oxidation state of the metal.
(B) X contains five electron sublevels.
(C) The atomic mass of X is 90.
(D) The atomic mass of X is between 90 and 92.
(D)
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-6-
6. A hot iron ball is dropped into a 200. g sample of
water initially at 50.° C. If 8.4 kJ of heat is
transferred from the ball to the water, what is the
final temperature of the water? (The specific heat
of water is 4.2 J/(g·°C).)
(A)
(B)
(C)
(D)
5. Which of the following is the strongest type of
interaction that occurs between the atoms within
the circled areas of the two molecules represented
above?
(A)
(B)
(C)
(D)
40.°C
51°C
60.°C
70.°C
Polar covalent bond
Nonpolar covalent bond
Hydrogen bond
London dispersion forces
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-7-
Questions 7-9 refer to the following information.
At 27°C, five identical rigid 2.0 L vessels are filled with N2(g) and sealed. Four of the five vessels also contain
a 0.050 mol sample of NaHCO3 ( s), NaBr( s), Cu( s), or I2 ( s), as shown in the diagram above. The volume taken up
by the solids is negligible, and the initial pressure of N2(g) in each vessel is 720 mm Hg. All four vessels are heated
to 127°C and allowed to reach a constant pressure.
7. At 127°C, the pressure in vessel 1 is found to be higher than that in vessel 2. Which of the following reactions
best accounts for the observation?
(A) NaHCO 3 ( s) Æ Na( s) + HCO 3 (s)
(B) NaHCO 3 ( s) Æ NaH( s) + CO 3 ( s)
(C) 2 NaHCO3 ( s ) Æ Na 2 CO 3 ( s ) + CO 2 ( g) + H 2O( g)
(D) 2 NaHCO3 (s ) + N 2 (g ) Æ 2 NaNO 3 (s) + C 2 H 2 (g )
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-8-
8. At 127°C, the entire sample of I2 is observed to
have vaporized. How does the mass of vessel 5
at 127°C compare to its mass at 27°C?
(A) The mass is less, since the I2 is in the vapor
phase.
(B) The mass is the same, since the number of
each type of atom in the vessel is constant.
(C) The mass is greater, since the I2 will react
with N2 to form NI3 , which has a greater
molar mass.
(D) The mass is greater, since the pressure is
greater and the particles have a higher
average kinetic energy.
9. The gas particles in vessel 3 at 27°C are
represented in the diagram above. The lengths
of the arrows represent the speeds of the particles.
Which of the following diagrams best represents
the particles when vessel 3 is heated to 127°C?
(A)
(B)
(C)
(D)
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-9-
Ionization Energy
(kJ/mol)
10. An acetate buffer solution is prepared by
combining 50. mL of 0.20 M acetic acid,
HC2H3O2(aq), and 50. mL of 0.20 M sodium
acetate, NaC2H3O2(aq). A 5.0 mL sample of
0.10 M NaOH(aq) is added to the buffer solution.
Which of the following is a correct pairing of the
acetate species present in greater concentration
and of the pH of the solution after the NaOH(aq)
is added? (The pKa of acetic acid is 4.7.)
Acetate Species
(A)
(B)
(C)
(D)
HC2H3O2
HC2H3O2
C2H3O2C2H3O2-
First
< 4.7
> 4.7
< 4.7
(A)
(B)
(C)
(D)
> 4.7
Molecular
Formula
Molar Mass
(g/mol)
Ethane
C2H6
30
Butane
C4H10
58
Second
2,430
Third
3,660
Fourth
25,000
Fifth
32,820
12. The first five ionization energies of a
second-period element are listed in the table
above. Which of the following correctly
identifies the element and best explains the
data in the table?
pH
Name
801
B, because it has five core electrons
B, because it has three valence electrons
N, because it has five valence electrons
N, because it has three electrons in the
p sublevel
Æ Mg2+(aq) + 2 OH-(aq)
Mg(OH)2(s) ¨
13. The exothermic dissolution of Mg(OH)2(s) in
water is represented by the equation above. The
Ksp of Mg(OH)2 is 1.8 ¥ 10-11. Which of the
following changes will increase the solubility of
Mg(OH)2 in an aqueous solution?
11. The molecular formula and molar mass of two
straight-chain hydrocarbons are listed in the table
above. Based on the information in the table,
which compound has the higher boiling point,
and why is that compound’s boiling point higher?
(A)
(B)
(C)
(D)
(A) C4H10 , because it has more hydrogen atoms,
resulting in more hydrogen bonding
(B) C4H10 , because it has more electrons,
resulting in greater polarizability and
stronger dispersion forces
(C) C2H6 , because its molecules are smaller and
they can get closer to one another, resulting
in stronger dispersion forces
(D) C2H6 , because its molecules are more polar,
resulting in stronger dipole-dipole
attractions
Unauthorized copying or reuse of
any part of this page is illegal.
Decreasing the pH
Increasing the pH
Adding NH3 to the solution
Adding Mg(NO3)2 to the solution
GO ON TO THE NEXT PAGE.
-10-
14. The heating curve for a sample of pure ethanol is provided
above. The temperature was recorded as a 50.0 g sample of
solid ethanol was heated at a constant rate. Which of the
following explains why the slope of segment T is greater
than the slope of segment R ?
(A) The specific heat capacity of the gaseous ethanol is less
than the specific heat capacity of liquid ethanol.
(B) The specific heat capacity of the gaseous ethanol is
greater than the specific heat capacity of liquid ethanol.
(C) The heat of vaporization of ethanol is less than the heat
of fusion of ethanol.
(D) The heat of vaporization of ethanol is greater than the
heat of fusion of ethanol.
H3PO4 Æ̈ H+ + H2PO4−
K a1 = 7.2 × 10−3
H2PO4− Æ̈ H+ + HPO42−
K a2 = 6.3 × 10−8
HPO42− Æ̈ H+ + PO43−
K a3 = 4.5 × 10−13
15. A solution is prepared by mixing 50 mL of 1 M NaH2PO4
with 50 mL of 1 M Na2HPO4 . On the basis of the
information above, which of the following species is present
in the solution at the lowest concentration?
(A) Na+
(B) HPO42−
(C) H2PO4−
(D) PO43−
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-11-
Æ X (g) + Y (g)
2 XY(g) ¨
2
2
Kp = 230
16. A certain gas, XY(g), decomposes as represented by the
equation above. A sample of each of the three gases is put
in a previously evacuated container. The initial partial
pressures of the gases are shown in the table below.
Gas
Initial Partial
Pressure (atm)
XY
0.010
X2
0.20
Y2
2.0
The temperature of the reaction mixture is held constant. In
which direction will the reaction proceed?
(A)
(B)
(C)
(D)
The reaction will form more products.
The reaction will form more reactant.
The mixture is at equilibrium, so there will be no change.
It cannot be determined unless the volume of the
container is known.
Questions 17-20 refer to the following information.
17. Which of the following changes will most likely
increase the rate of reaction between Li(s) and
water?
A 0.35 g sample of Li(s) is placed in an
Erlenmeyer flask containing 100 mL of water
at 25°C. A balloon is placed over the mouth of the
flask to collect the hydrogen gas that is generated.
(A) Using 125 mL of water instead of 100 mL
(B) Using a 0.25 g sample of Li(s) instead of a
0.35 g sample
(C) Using a 0.35 g sample of Li(s) cut into small
pieces
(D) Decreasing the water temperature before
adding the Li(s)
After all of the Li(s) has reacted with H2O(l), the
solution in the flask is added to a clean, dry buret and
used to titrate an aqueous solution of a monoprotic
acid. The pH curve for this titration is shown in the
diagram below.
18. What will be the effect on the amount of gas
produced if the experiment is repeated using
0.35 g of K(s) instead of 0.35 g of Li(s) ?
(A) No gas will be produced when K(s) is used.
(B) Some gas will be produced but less than the
amount of gas produced with Li(s) .
(C) Equal quantities of gas will be produced with
the two metals .
(D) More gas will be produced with K(s) than
with Li(s).
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-12-
19. On the basis of the pH curve, the pKa value of the
acid is closest to
(A)
(B)
(C)
(D)
4
5
8
12
20. Which of the following is the balanced net-ionic equation for the reaction between Li(s) and water?
(A) 2 Li(s) + 2 H+(aq) + 2 OH−(aq) → 2 Li+(aq) + 2 OH−(aq) + H2(g)
(B) 2 Li(s) + 2 H2O(l) → 2 Li+(aq) + 2 OH−(aq) + H2(g)
(C) 2 Li(s) + 2 H2O(l) → 2 LiOH(s) + H2(g)
(D) 2 Li(s) + 2 H2O(l) → 2 LiH(s) + H2(g)
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-13-
23. A 1.0 g sample of a cashew was burned in a
calorimeter containing 1000. g of water, and the
temperature of the water changed from 20.0°C
to 25.0°C. In another experiment, a 3.0 g sample
of a marshmallow was burned in a calorimeter
containing 2000. g of water, and the temperature
of the water changed from 25.0°C to 30.0°C.
Based on the data, which of the following can be
concluded about the energy content for 1.0 g of
each of the two substances? (The specific heat of
water is 4.2 J/(g⋅°C).)
21. Benzene, C6H6 , has the structure shown above.
Considering the observation that benzene is only
sparingly soluble in water, which of the following
best describes the intermolecular forces of
attraction between water and benzene?
(A) The combustion of 1.0 g of cashew releases
less energy than the combustion of 1.0 g of
marshmallow.
(B) The combustion of 1.0 g of cashew releases
the same amount of energy as the
combustion of 1.0 g of marshmallow.
(C) The combustion of 1.0 g of cashew releases
more energy than the combustion of 1.0 g of
marshmallow.
(D) No comparison can be made because the
two systems started with different masses
of food, different masses of water, and
different initial temperatures.
(A) Benzene is nonpolar, therefore there are no
forces between water and benzene.
(B) The H atoms in benzene form hydrogen
bonds with the O atoms in water.
(C) Benzene is hydrophobic, therefore there is a
net repulsion between water and benzene.
(D) There are dipole-induced dipole and London
dispersion interactions between water and
benzene.
Solution
Acid
Ka
1
CH3CO2H
1.75 ¥ 10-5
2
CF3CO2H
1.0 ¥ 100
22. Acid-dissociation constants of two acids are
listed in the table above. A 20. mL sample of
a 0.10 M solution of each acid is titrated to the
equivalence point with 20. mL of 0.10 M NaOH.
Which of the following is a true statement about
the pH of the solutions at the equivalence point?
(A) Solution 1 has a higher pH at the equivalence
point because CH3CO2H is the stronger
acid.
(B) Solution 1 has a higher pH at the equivalence
point because CH3CO2H has the stronger
conjugate base.
(C) Solution 1 has a lower pH at the equivalence
point because CH3CO2H is the stronger
acid.
(D) Solution 1 has a lower pH at the equivalence
point because CH3CO2H has the stronger
conjugate base.
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-14-
24. The reaction between NO(g) and O2(g) to produce NO2(g) in a rigid reaction vessel is represented in the
diagram above. The pressure inside the container is recorded using a pressure gauge. Which of the following
statements correctly predicts the change in pressure as the reaction goes to completion at constant temperature,
and provides the correct explanation?
(A) The pressure will increase because the product molecules have a greater mass than either of the reactant
molecules.
(B) The pressure will decrease because there are fewer molecules of product than of reactants.
(C) The pressure will decrease because the product molecules have a lower average speed than the reactant
molecules.
(D) The pressure will not change because the total mass of the product molecules is the same as the total mass of
the reactant molecules.
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-15-
Questions 25-29 refer to the following information.
2 H2O2(aq) Æ 2 H2O(l) + O2(g)
DH° = −196 kJ/molrxn
The decomposition of H2O2(aq) is represented by the equation above. A student monitored the decomposition of a
1.0 L sample of H2O2(aq) at a constant temperature of 300. K and recorded the concentration of H2O2 as a function
of time. The results are given in the table below.
Time (s)
[H2O2]
0
2.7
200.
2.1
400.
1.7
600.
1.4
25. Which of the following identifies the element(s)
being oxidized and reduced in the reaction?
(A)
(B)
(C)
(D)
27. Which of the following statements is a correct
interpretation of the data regarding how the order
of the reaction can be determined?
Hydrogen is oxidized and oxygen is reduced.
Oxygen is oxidized and hydrogen is reduced.
Oxygen is both oxidized and reduced.
No elements are oxidized or reduced; the
reaction is not a redox reaction.
(A) The reaction must be first order because there
is only one reactant species.
(B) The reaction is first order if the plot of
ln [H2O2] versus time is a straight line.
(C) The reaction is first order if the plot of
1/[H2O2] versus time is a straight line.
26. The O2(g) produced from the decomposition of
the 1.0 L sample of H2O2(aq) is collected in a
previously evacuated 10.0 L flask at 300. K .
What is the approximate pressure in the flask
after 400. s ? (For estimation purposes, assume
that 1.0 mole of gas in 1.0 L exerts a pressure
of 24 atm at 300. K.)
(D) The reaction is second order because 2 is
the coefficient of H2O2 in the chemical
equation.
28. The reaction is thermodynamically favorable. The
signs of ΔG° and ΔS° for the reaction are which
of the following?
(A) 1.2 atm
(B) 2.4 atm
(C) 12 atm
(D) 24 atm
ΔG °
(A) Positive
(B) Negative
(C) Positive
(D) Negative
Unauthorized copying or reuse of
any part of this page is illegal.
ΔS °
Positive
Positive
Negative
Negative
GO ON TO THE NEXT PAGE.
-16-
29. Assume that the bond enthalpies of the oxygenhydrogen bonds in H2O are not significantly
different from those in H2O2 . Based on the value
of ΔH° of the reaction, which of the following
could be the bond enthalpies (in kJ/mol) for the
bonds broken and formed in the reaction?
(A)
(B)
(C)
(D)
O–O
in H2O2
300
150
500
250
O O
in O2
500
500
300
300
32. A sample of a compound that contains only
the elements C, H , and N is completely burned
in O2 to produce 44.0 g of CO2 , 45.0 g of H2O,
and some NO2 . A possible empirical formula of
the compound is
(A)
(B)
(C)
(D)
O–H
500
500
150
150
CH2N
CH5N
C2H5N
C3H3N2
Æ H O+(aq) + F −(aq)
HF(aq) + H2O(l) ¨
3
33. The dissociation of the weak acid HF in water
is represented by the equation above. Adding a
1.0 mL sample of which of the following would
increase the percent ionization of HF(aq) in
10 mL of a solution of 1.0 M HF ?
30. Which of the following accounts for the
observation that the pH of pure water at 37°C
is 6.8 ?
(A)
(B)
(C)
(D)
(A) At 37∞C water is naturally acidic.
(B) At 37∞C the autoionization constant for
water, Kw , is larger than it is at 25∞C.
(C) At 37∞C water has a lower density than it
does at 25∞C; therefore, [H+] is greater.
(D) At 37∞C water ionizes to a lesser extent than
it does at 25∞C.
1.0 M KF
1.0 M H2SO4
10.0 M HF
Distilled water
31. To gravimetrically analyze the silver content of
a piece of jewelry made from an alloy of Ag and
Cu, a student dissolves a small preweighed
sample in HNO3(aq). Ag+(aq) and Cu2+(aq) ions
form in the solution. Which of the following
should be the next step in the analytical process?
(A) Centrifuging the solution to isolate the
heavier ions
(B) Evaporating the solution to recover the
dissolved nitrates
(C) Adding enough base solution to bring the pH
up to 7.0
(D) Adding a solution containing an anion that
forms an insoluble salt with only one of the
metal ions
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-17-
Questions 34-36 refer to the reactions represented below, which are involved in a demonstration commonly
known as “underwater fireworks.”
Reaction 1: CaC2(s) + 2 H2O(l)  C2H2(g) + Ca(OH)2(s)
Reaction 2: NaOCl(aq) + 2 HCl(aq)  Cl2(g) + NaCl(aq) + H2O(l)
Reaction 3: C2H2(g) + Cl2(g)  C2H2Cl2(g)
36. When Reaction 3 occurs, does the hybridization
of the carbon atoms change?
34. Ca(OH)2 (s) precipitates when a 1.0 g sample of
CaC2 (s) is added to 1.0 L of distilled water at
room temperature. If a 0.064 g sample of
CaC2 (s) (molar mass 64 g/mol) is used instead
and all of it reacts, which of the following will
occur and why? (The value of K sp for Ca(OH)2
(A) Yes; it changes from sp to sp 2 .
(B) Yes; it changes from sp to sp3 .
(C) Yes; it changes from sp2 to sp3 .
(D) No; it does not change.
is 8.0  108.)
(A) Ca(OH)2 will precipitate because Q > K sp .
(B) Ca(OH)2 will precipitate because Q < K sp .
(C) Ca(OH)2 will not precipitate because
Q > K sp .
(D) Ca(OH)2 will not precipitate because
Q < K sp .
35. Reaction 2 occurs when an excess of 6 M HCl(aq)
solution is added to 100. mL of NaOCl(aq) of
unknown concentration. If the reaction goes to
completion and 0.010 mol of Cl2(g) is produced,
then what was the molarity of the NaOCl(aq)
solution?
(A)
(B)
(C)
(D)
0.0010 M
0.010 M
0.10 M
1.0 M
Unauthorized copying or reuse of
any part of this page is illegal.
-18-
GO ON TO THE NEXT PAGE.
39. If equal masses of the following compounds
undergo complete combustion, which will yield
the greatest mass of CO2 ?
Ka
HC3H5O3(aq)
8.3 × 10− 4
CH3NH3+(aq)
2.3 × 10−11
(A)
(B)
(C)
(D)
37. The acid-dissociation constants of HC3H5O3(aq)
and CH3NH3+(aq) are given in the table above.
Which of the following mixtures is a buffer with a
pH of approximately 3 ?
Benzene, C6H6
Cyclohexane, C6H12
Glucose, C6H12O6
Methane, CH4
CaCO3(s) Æ̈ CaO(s) + CO2(g)
DH° = 178 kJ/molrxn
(A) A mixture of 100. mL of 0.1 M CH3NH3Cl
and 50. mL of 0.1 M NaOH
(B) A mixture of 100. mL of 0.1 M HC3H5O3
and 50. mL of 0.1 M NaOH
(C) A mixture of 100. mL of 0.1 M NaC3H5O3
and 100. mL of 0.1 M NaOH
(D) A mixture of 100. mL of 0.1 M CH3NH3Cl
and 100. mL of 0.1 M CH3NH2
40. The reaction system represented above is at
equilibrium. Which of the following will decrease
the amount of CaO(s) in the system?
(A) Increasing the volume of the reaction vessel
at constant temperature
(B) Lowering the temperature of the system
(C) Removing some CO2(g) at constant
temperature
(D) Removing some CaCO3(s) at constant
temperature
38. The Lewis electron-dot diagrams of the HClO3
molecule and the HClO2 molecule are shown
above at the left and right, respectively. Which of
the following statements identifies the stronger
acid and correctly identifies a factor that
contributes to its being the stronger acid?
(A) HClO3(aq) is the stronger acid because its
molecules experience stronger London
dispersion forces.
(B) HClO3(aq) is the stronger acid because the
additional electronegative oxygen atom on
the chlorine atom stabilizes the conjugate
base.
(C) HClO2(aq) is the stronger acid because its
molecules experience weaker London
dispersion forces.
(D) HClO2(aq) is the stronger acid because the
lone pairs of electrons on the chlorine atom
stabilize the conjugate base.
Acid
Solution
Volume of
NaOH Added
(mL)
A
40
B
75
C
115
D
200
41. To maximize the yield in a certain manufacturing
process, a solution of a weak monoprotic acid that
has a concentration between 0.20 M and 0.30 M
is required. Four 100. mL samples of the acid at
different concentrations are each titrated with a
0.20 M NaOH solution. The volume of NaOH
needed to reach the end point for each sample is
given in the table above. Which solution is the
most suitable to maximize the yield?
(A)
(B)
(C)
(D)
Unauthorized copying or reuse of
any part of this page is illegal.
Solution
Solution
Solution
Solution
A
B
C
D
GO ON TO THE NEXT PAGE.
-19-
Questions 42-44 refer to the following information.
When free Cl(g) atoms encounter O3(g) molecules in the upper atmosphere, the following
reaction mechanism is proposed to occur.
Cl(g) + O3(g) → ClO(g) + O2(g)
slow step
ClO(g) + O3(g) → Cl(g) + 2 O2(g)
fast step
2 O3(g) → 3 O2(g)
overall reaction
ΔH = − 285 kJ/molrxn
42. Which of the following rate laws for the overall
reaction corresponds to the proposed mechanism?
(A) Rate = k[O3]2
(B) Rate = k[Cl][O3]
(C) Rate = k[ClO][O3]2
(D) Rate = k
[O2 ]3
[O3 ]2
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-20-
43. Which of the following reaction energy profiles
best corresponds to the proposed mechanism?
X + O3 → XO + O2
XO + O3 → X + 2 O2
(A)
2 O3 → 3 O2
44. The proposed mechanism can be written in a more
general form, as shown above. Species other than
Cl can also decompose O3 through the same
mechanism. Which of the following chemical
species is most likely to decompose O3 in the
upper atmosphere through the above mechanism?
(A)
(B)
(C)
(D)
(B)
He
Br
N2
O2
(C)
(D)
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-21-
HX(aq) + Y−(aq) Æ̈ HY(aq) + X−(aq)
Keq > 1
45. A solution of a salt of a weak acid HY is added to a solution
of another weak acid HX . Based on the information given
above, which of the following species is the strongest base?
(A)
(B)
(C)
(D)
HX(aq)
Y−(aq)
HY(aq)
X−(aq)
X(g) + 2 Q(g) Æ̈ R(g) + Z(g)
Kc = 1.3 × 105 at 50°C
46. A 1.0 mol sample of X(g) and a 1.0 mol sample of Q(g) are
introduced into an evacuated, rigid 10.0 L container and
allowed to reach equilibrium at 50°C according to the
equation above. At equilibrium, which of the following is true
about the concentrations of the gases?
1
[Q]
2
1
(B) [Q] =
[X]
2
(A) [R] =
(C) [R] = [Z] > [Q]
(D) [X] = [Q] = [R] = [Z]
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-22-
47. The potential energy of a system of two atoms as a function
of their internuclear distance is shown in the diagram above.
Which of the following is true regarding the forces between
the atoms when their internuclear distance is x ?
(A) The attractive and repulsive forces are balanced, so the
atoms will maintain an average internuclear distance x.
(B) There is a net repulsive force pushing the atoms apart, so
the atoms will move further apart.
(C) There is a net attractive force pulling the atoms together,
so the atoms will move closer together.
(D) It cannot be determined whether the forces between
atoms are balanced, attractive, or repulsive, because the
diagram shows only the potential energy.
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-23-
X(g) + 2 Y(g) Æ XY2(g)
48. In order to determine the order of the reaction represented
above, the initial rate of formation of XY2 is measured using
different initial values of [X] and [Y] . The results of the
experiment are shown in the table below.
Initial Rate of Formation of XY2
Trial
[X]
[Y]
1
0.50
0.50
8.0 ¥ 10-3
2
1.00
0.50
3.2 ¥ 10-2
3
1.00
1.00
6.4 ¥ 10-2
(M s-1)
In trial 2 which of the reactants would be consumed more
rapidly, and why?
(A)
(B)
(C)
(D)
X, because it has a higher molar concentration.
X, because the reaction is second order with respect to X.
Y, because the reaction is second order with respect to Y.
Y, because the rate of disappearance will be double
that of X.
49. In a paper chromatography experiment, a sample of a
pigment is separated into two components, X and Y, as
shown in the figure above. The surface of the paper is
moderately polar. What can be concluded about X and Y
based on the experimental results?
(A)
(B)
(C)
(D)
X
Y
X
Y
has a larger molar mass than Y does.
has a larger molar mass than X does.
is more polar than Y.
is more polar than X.
Unauthorized copying or reuse of
any part of this page is illegal.
GO ON TO THE NEXT PAGE.
-24-
50. The diagram above represents the absorption spectrum for a pure molecular substance. Which of the following
correctly indicates the type of transition observed for the substance in each of the regions of the absorption
spectrum?
(A)
(B)
(C)
(D)
Region X
Molecular vibration
Electronic transition
Molecular rotation
Electronic transition
Region Y
Molecular rotation
Molecular rotation
Molecular vibration
Molecular vibration
Unauthorized copying or reuse of
any part of this page is illegal.
Region Z
Electronic transition
Molecular vibration
Electronic transition
Molecular rotation
GO ON TO THE NEXT PAGE.
-25-
END OF SECTION I
IF YOU FINISH BEFORE TIME IS CALLED,
YOU MAY CHECK YOUR WORK ON THIS SECTION.
DO NOT GO ON TO SECTION II UNTIL YOU ARE TOLD TO DO SO.
________________________________
MAKE SURE YOU HAVE DONE THE FOLLOWING.
PLACED YOUR AP NUMBER LABEL ON YOUR ANSWER SHEET
WRITTEN AND GRIDDED YOUR AP NUMBER CORRECTLY ON YOUR
ANSWER SHEET
TAKEN THE AP EXAM LABEL FROM THE FRONT OF THIS BOOKLET
AND PLACED IT ON YOUR ANSWER SHEET
Unauthorized copying or reuse of
any part of this page is illegal.
-2 -