Chemistry 12
Unit 1 ~ Learning Guide Name: ______________________________
Instructions:
Using a pencil, complete the following notes as you work through the related lessons. Show ALL
work as is explained in the lessons. You are required to have this package completed BEFORE
you write your unit test. Do your best and ask questions if you don’t understand anything! Some
questions have hints at the end of the learning guide. Try questions on your own before using them.
Please print out the Formula Sheet and found at the start of the course. You will need this to
do assignments and tests!
Math in Science (review):
Measurements:
1.
Why might scientists want to use metric measurements instead of Imperial measurements?
2. What are base units for:
a) Mass:
b) Distance:
c) Try finding this one online: Volume:
For specific prefixes, the involve a power of 10 or moving a decimal left or right.
Reminder: k h
da
___
d
c
m
3. What does the ____ represent (or what do you put there)?
4. If I give you kg, what is the root unit?
5. If I give you 6.3kg and want to get ? g, what would your answer be?
Practice:
6.
3.2cm = ? mm
7.
3.2cm = ? km
8.
40cg = ? g
9.
1.3kg = ? mg
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Chemistry 12
Scientific Notation:
10. Based on what you saw and read in this lesson, why might you want to use scientific notation?
11. What is the format of Scientific Notation (include an example):
Eg. Convert to Scientific Notation
12. 5972000000000000000000000 kg
13. 0.0000000000000000000000000000009109 kg
14. 6371000 m
15. 0.000025 m
Try math with scientific notation using your calculator:
16. 4.37 x 105 x 3.21 x 104 =
17. 3.44 x 1024 / (6.02 x 1023) =
Significant Figures Rules:
18. What are the 5 rules for significant figures?
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Chemistry 12
Using the 5 rules, complete the following table. NOTE: If you struggle with any of these, write your
question or confusion in the QUESTION column and check in with your teacher for clarification.
Eg.
# sig figs
Rule(s) used
Sci Notation
Questions?
37
6.92
670
5000
4000.
65.0
30.0020
0.004
6.00x10-2
Significant Figures:
Complete each calculation ending with the correct number of significant figures
19. A chemist cuts a 13.25cm strip of magnesium to use only 5.8cm of it. What length of magnesium
remains?
20. A rectangular block has the dimensions 3.2cm x 4.71cm x 12cm. What is the volume of the block?
21. A rectangular garden plot has sides of length 13.21m and 6.10m. What is the area covered by this
plot?
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Chemistry 12
Dimensional Analysis & Unit Conversions
22. Convert 28.6 seconds to hours?
23. Convert 600min to days
24. Convert 7 m/s to km/hr
Reaction Rates:
25. What is the definition of a reaction rate?
26. For each of the following write i) a balanced chemical formula equation, ii) a complete ionic
equation and iii) a net ionic equation.
a) Magnesium metal is placed in a solution of hydrochloric acid and reacts to form aqueous
magnesium chloride and hydrogen gas
b) Aqueous chlorine is added to a solution of aluminum bromide in a single replacement reaction
which forms no precipitate and bromine liquid.
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Chemistry 12
27. For the following questions use the reaction in question 26a)
a) There are five possible rate equations that could be used to measure the reaction rate. Write two
of these possible rate equations.
b) What is the spectator ion for this reaction?
c) If 0.0586 L of hydrogen gas is collected in 5.00 minutes, calculate the rate of the reaction in mL
of hydrogen gas per second.
d) Using the reaction rate you calculated above, calculate the volume of hydrogen as produced in
23.0 minutes.
e) Using the reaction rate you calculated above, calculate how long in minutes it takes to produce
1.50 L H2.
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Chemistry 12
28. Use the reaction below to answer the following questions.
2 Ag(s) + Zn(NO3)2(aq) → Zn(s) + 2 Ag(NO3)2(aq)
a) It is found that the rate of production of Zn(s) is 10.7 g/s. Calculate the mass of silver (in kg)
reacted in 15.2 minutes.
b) If 14.3g of silver is used up in 5.0 minutes, what mass of zinc (in g) is formed in 45 seconds?
29. What is the rate of reaction at 20 seconds? You will need to draw a tangent line. It can be tricky
to draw a perfect tangent line so don't worry if your answer does not exactly match the answer key.
70
60
50
40
Mass (g)
30
20
10
0
0
20
40
Time (s)
60
30. What are four factors that affect a reaction rate?
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80
100
120
Chemistry 12
31. List five ways you can increase the reaction rate of the reaction below.
6 Mg(s) + 1 N2(g) → 2 Mg3N(s)
32. Is the reaction in the previous question homogeneous or heterogeneous and how do you know?
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Chemistry 12
Sample Answers:
7. 3.2 x 10-5 km
9. 1.3 x 106mg
Scientific Notation
12. 5.972 x 1024 kg
14. 6.371 x 106 m
16. 1.40 x 1010
Significant Figure Rules
Eg.
670
30.0020
0.004
# sig figs
2
6
1
Rule(s) used
1, 3
1, 2, 4
1, 5
Sci Notation
6.7x102
3.00020x101
4x10-3
Significant Figures
21. 80.6m2 (3 sig figs)
Dimensional Analysis & Unit Conversions
22. 0.00794 hours
Reaction Rates
28. a) 32.2kg Ag
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b) 0.65g Zn
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Questions?