Pre-AP Chemistry
Mrs. Sewell
Guidelines and Expectations in class:
1. Develop good organizational and time management skills.
2. YOU MAY NOT GO TO YOUR LOCKER IF YOU FORGOT
SOMETHING!
3. Write down all homework assignments and due dates.
4. You are responsible for reading the chapters in the text book on the
topics that are covered in class.
5. Keep up with all assignments (including lab reports). I will not
collect anything past its due date!
6. Save all handouts. I will not give you a copy of something that you
lost!
7. Always ask questions, take notes and pay attention!
8. If you are absent you are responsible for finding out what you missed.
No excuses for missed homework even if you are absent. If you are
absent the class before the test you are still responsible for taking the
test in the next class period. If you are absent for a test you will make
it up the following day after school or on your free period. My email:
sewell@swampscott.k12.ma.us
9. Each chapter covered will consist of an occasional class quizzes or
and one test.
10. All honors chemistry student will be required to participate in a
science fair project!!!!
Rules for Basic Lab Safety
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Wear Safety goggles at all times
Wear shoes that cover and protect the feet
Loose clothing can be hazardous
Long hair should be pulled back
Use appropriate hand protection
Record all accidents
Never taste, smell or touch chemicals
Never eat or drink in the lab
Clean up spills promptly
Clean all materials used
Review specific safety hazards before experiment begins
We will go over lab safety in class. Any student who does not practice safe
laboratory techniques will get an F for that lab period. Lab journals will be
collected randomly throughout the year so make sure you are up to speed at
all times.
Grading:
Test 50%
Quiz 25%
Lab 20%
Homework 5%
Honors Summer Packet
Helpful websites:
http://wps.prenhall.com/esm_corwin_chemistry_4/16/4162/1065649.cw/i
ndex.html
http://antoine.frostburg.edu/chem/senese/101/intro/index.shtml
http://www.brightstorm.com/science/chemistry/
This packet is due the first week of school and will count as a quiz grade!!!!!
It is covering the first three chapters of the course: Scientific Method,
Measurements and Introduction to Matter.
Scientific Notation and Unit Prefixes
Make the following conversions:
1)
3.4 liters to milliliters
6)
45 meters to centimeters
2)
876 millimeters to meters
7)
11.7 grams to kilograms
3)
78,999 milligrams to grams
8)
0.0009 kiloliters to liters
4)
0.9 centigrams to grams
9)
44 centimeters to meters
5)
112 meters to millimeters
10)
277 kilograms to grams
_____________________________________________________________
Convert the following to scientific notation:
11)
45,700 ______________________________
12)
0.009 ______________________________
13)
23 ______________________________
14)
0.9 ______________________________
15)
24,212,000 ______________________________
16)
0.000665 ______________________________
17)
Convert 0.09 miles to inches (there are 36 inches in a yard and 1760
yards in a mile)
18)
Convert 4.66 centimeters to miles (there are 0.6 miles in a kilometer)
19)
Convert 84 miles to kilometers (there are 0.6 miles in a kilometer)
20)
Convert 16.7 inches to feet
Significant figures
RULES
Significant figures are critical when reporting scientific data because they
give the reader an idea of how well you could actually measure/report your
data. Before looking at a few examples, let's summarize the rules for
significant figures.
1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS
significant.
2) ALL zeroes between non-zero numbers are ALWAYS significant.
3) ALL zeroes which are SIMULTANEOUSLY to the right of the
decimal point AND at the end of the number are ALWAYS
significant.
4) ALL zeroes which are to the left of a written decimal point and are
in a number >= 10 are ALWAYS significant.
A helpful way to check rules 3 and 4 is to write the number in scientific
notation. If you can/must get rid of the zeroes, then they are NOT
significant.
Examples: How many significant figures are present in the following
numbers?
Number
# Significant Figures Rule(s)
48,923
5
1
3.967
4
1
900.06
5
1,2,4
0.0004 (= 4 E-4)
1
1,4
8.1000
5
1,3
501.040
6
1,2,3,4
3,000,000 (= 3 E+6)
1
1
10.0 (= 1.00 E+1)
3
1,3,4
Practice for Significant Figures
1. State the number of significant digits in each measurement.
1) 2804 m
2) 2.84 km
3) 5.029 m
4) 0.003068 m
5) 4.6 x 105 m
6) 4.06 x 10-5 s
7) 750 m
8) 75 m
9) 75,000 m
10) 75.00 m
11) 75,000.0 m
12) 10 cm
Round the following numbers as indicated:
To four significant figures:
3.682417
21.860051
375.6523
112.511
45.4673
To two sig. figs:
1.3511
2.473
5.687524
7.555
8.235
79.2588
0.03062
3.4125
41.86632
To three:
22.494
3. Solve the following problems and report answers with appropriate number
of significant digits and units!!
Rules:
Adding/subtracting, record your answer to the fewest places after the
decimal from the measurements in the problem.
Multiplying and dividing, record your answer to the fewest of significant
digits of the measurements in the problem regardless of the decimal.
1)
6.201 cm + 7.4 cm + 0.68 cm +12.0 cm =
2)
1.6 km + 1.62 m +1200 cm =
3)
8.264 g - 7.8 g =
4)
10.4168 m - 6.0 m =
5)
12.00 m+15.001 kg=
6)
1.31 cm x 2.3 cm =
7)
5.7621 m x 6.201 m =
8) 20.2 cm : 7.41 s =
For each of the following, determine whether a chemical or physical change
is taking place:
1)
A hot dog is cooked
2)
Thousand Island dressing and mayonnaise are mixed to make “secret
sauce” for hamburgers
3)
Water is boiled in preparation for making pasta
4)
Old ham goes bad in the refrigerator
HOMOGENEOUS VS. HETEROGENEOUS MATTER
Classify the following as either homogeneous or heterogeneous.
1. flat soft drink (no bubbles)
9. air (with smog)
2. chocolate chip ice cream
10. paint
3. Italian salad dressing
11. alcohol
4. sugar
12. iron
5. soil
13. beach sand
6. aluminum foil
14. pure air
7. black coffee
15. chunky spaghetti sauce
8. sugar water
-------------------------------------------------------------------------------------------PURE SUBSTANCES VS. MIXTURES
Classify the following as pure substances or mixtures.
1. sodium
5. iron
2. water
6. salt water
3. soil
4. coffee
7. chocolate chip cookie
8. nitrogen gas