Welcome Back!
Catalyst:
1.
2.
3.
Pick up all handouts by the door
Turn Chapter 1 and 2 homework into the bin for your period.
How many significant figures are in 0.5000
4.
5.
(0.24567)(0.034) = ? (GIVE CORRECT SIG FIGS)
4.5 + 0.01434 = ? (GIVE CORRECT SIG FIGS)

Syllabus

I Buy!
You Buy!

What You Need Everyday
1. 3 Ring Binder with 5 Tabs
• PowerPoints, In-Class Handouts, Homework, Lab,
Quizes/Tests. Learning Target Logs go in front of
PowerPoint Tab
• It is recommended that it be at least 1 ½ inches thick.
2. Notebook
3. TI-30X Calculator
4. Pen/Pencil
5. Lab Notebook
• Will be available to purchase from Mr. Lance ($10)
• Only needed on lab days

Grade for this Class
1.
Exams (45%)
2.
Class Work/Homework (10%)
• Homework is due on the day of the exam. Answers will be posted at least 2 days prior to the exam.
• Also, will receive 5 EC points on unit exam
3.
4.
Labs/Write Ups/Projects (20%)
Quarter and Semester Mock AP Exams
(25%)

Letter Grade for this Class
Letter Grade
A (5.0 – 4.1)
B (4.0 – 3.1)
Percent
100% - 85%
84.9% - 70%
C (3.0
– 2.1) 69.9% - 55%
NP (2.0 – 0.0) 54.9% and below

College Note Taking

Reflection on Note Taking
With your table:
• Compare your notes on the PowerPoint against Mr. Lance’s.
• What did you miss?
• How are you going to have to work to improve these skills throughout the year?

Note Taking Policy for AP Chemistry
• I will give you a printout of the slides for the day’s lecture when you come into class
• It is your responsibility to annotate these notes.
• You need to add ideas from the lecture, problems we do in class, and/or other relevant information.

Quick Write
1. What percentage of Hispanics do you think passed the
AP Chemistry Exam in 2011 with a 3 or higher?
2. What percentage of Whites do you think passed the AP
Chemistry Exam in 2011 with a 3 or higher?
3. What percentage of students nationally passed the AP
Chemistry Exam in 2011 with a 3 or higher

90
80
70
60
50
40
30
20
10
-
American
Indian
Asian Black Hispanic White Other National
Average
Pass
Fail

Harvard-Westlake Scores
100
90
80
70
60
50
40
30
20
10
0
AP Chemistry Students

Goal Setting
With your group:
• What percent of the class do you want to see pass the AP
Chemistry exam with a 3 or higher?
• What is it going to take to achieve this goal? CONCRETE
ACTIONS

Group Share

Class Goal Setting

Average Time Spent Studying by Major

AP Chemistry Expectation

Unit 0 Learning Target Log

Precision and Accuracy
• Precision – Measure of how close individual measurements agree with one another
• A standard deviation tells someone how precise you were during a laboratory.
• Accuracy – How close individual measurements agree with the “true” value.

Significant Figures
• There is always uncertainty in the last digit of any quantity that we report.
• Significant Figures – All digits of a measured quantity
• The number of digit reported represent the number of significant figures a number has

Determining the Number of Sig Figs
• The most important rule is that all nonzero digits in any measurement are significant:
1.
2.
3.
Zeros between nonzero digits are always significant.
For example, 1005 has ______ sig figs.
Zeros at the beginning of a number are never significant. For example, 0.005 has _____ sig fig.
Zeros at the end of a number are significant only if there is a decimal. For example, 3.0 has ____ sig figs, but 30 has _______ sig fig.

A Note on Scientific Notation
• Recall that we can write a number like 10,300 in scientific notation as 1.03 x 10 4
• This number would have _____ sig figs

Sig Figs for Calculations
• Determine sig figs only after a calculation is complete.

Sig Fig for Addition/Subtraction
• When you add/subtract numbers, the answer has the same number of decimal places as the number with the least decimal places.
20.42
1.332
+
83.1
104.842
Round off to one decimal place since 83.1 has the least number of decimal places!
Final answer you report is
104.8

Sig Figs for Multiplication/Division
• When you multiply or divide numbers, the answer has the same number of sig figs as the number with the fewest sig figs.
Area
=
(6.221
cm )(5.2
cm )
=
32.3492
cm
2
4 sig figs
2 sig figs, so the answer needs 2 sig figs
32 cm 2

Sig. Fig Practice
• Complete Problem Set 1.1
• Be sure to use the appropriate units!

Closing Time
• Have all supplies by Thursday/Friday
• Quiz on Ch. 1 and 2 on Thursday/Friday
• Homework will be available for pickup by the end of
Tuesday (Answers posted on class website).
• Focus on metric system, sig figs, dimensional analysis, and naming!