Chem 152 Exam 3 Review and Topics Fall 2004
The third exam picks up where the last one left off, with Chapter 8 (reactions). It will also cover
material from Chapter 10, Chapter 12 and Chapter 14. Here is a list of most of the topics we covered.
Best way to study: Homework, Homework, Homework. Also, review your quizzes.
Chapter 8
1. Evidence for Chemical Reactions
2. Writing Chemical Equations
3. Balancing Chemical Equations
4. Classifying Reactions
a. Combination
b. Decomposition
c. Single Replacement
d. Double Replacement
i. Formation of Precipitate
ii. Neutralization
iii. Formation of Gas
e. Combustion
5. Single Replacement Reactions
a. Predicting Products (Activity
Series)
b. Writing Ionic and Net Ionic
Equations
6. Double Replacement
a. Predicting Products
b. Writing Ionic and Net Ionic
Equations
Chapter 10:
1. Stoichiometry Problems
a. moles to moles
b. moles to grams
c. grams to grams
2. Limiting Reactants: Concept and
Calculations
3. Percent Yield Calculations
Chapter 12:
1. Ionic Bonds
2. Covalent Bonds
a. Electron dot structures of
molecules
b. Electron dot structures of
polyatomic ions
c. Electronegativities and Polar
Covalent Bonds
3. Shapes of Molecules
4. Polar Molecules
Chapter 14 (Sections 9 – 10):
1. Definitions: Solute, solvent, solution,
concentration
2. Molarity Calculations
3. Dilution Calculations
There are some review problems in the textbook (but these are far from a complete review, see note
above about homework, quizzes and notes). Answers are below.
Pages 224 – 225
Key Concepts: 8 – 10, 13 – 15
Key Terms: 8, 11 – 16
Review Exercises: 12 – 15
Pages 308 - 309
Key Concepts: 7
Review Exercises: 1, 2, 6, 9 (note: in #1, 2 & 6, "STP" means "standard temperature and
pressure", it is not needed to do the problem).
Pages 396 – 397
Key Concepts: 1, 3 – 5
Key Terms: 1 – 7, 20
Review Exercises: 3 – 5, 13 – 14
ANSWERS TO REVIEW QUESTIONS:
Pages 224 – 225
Key Concepts:
8. Hg
9. Ag
10. The reaction is: HCl(aq) + NaHCO3(aq) --> NaCl(aq) + H2O(l) + CO2(g)
The bubbles are due to the carbon dioxide gas produced.
13. 2Al(s) + 6HNO3(aq) --> 2Al(NO3)3(aq) + 3H2(g)
15. HNO3(aq) + KOH(aq) --> KNO3(aq) + H2O(l)
Key Terms:
8. precipitate
14. double replacement
11. combination
15. neutralization
12. decomposition
16. activity series
13. single replacement
Review Exercises:
12. 2 Co(HCO3)3(s) --> Co2(CO3)3(s) + 3 H2O(s) + 3 CO2(g)
13. Co(s) + Ni(NO3)2(aq) --> Co(NO3)2(aq) + Ni(s)
14. Pb(NO3)2(aq) + 2 LiI(aq) --> PbI2(s) + 2 LiNO3(aq)
15. H2CO3(aq) + 2 NH4OH(aq) --> (NH4)2CO3(aq) + 2 H2O(l)
Pages 308 – 309
Key Concepts:
Review Exercises:
7. a) 2.50 mole O2 b) 5.00 mole SO3
1. 2.26 x 1023
2. 10.5 g
6. 0.389 g CH4
Pages 396 – 397
Key Concepts:
1. ionic bond
3.
5.
e- pair geometry (family) = tetrahedral;
Key Terms:
1.
covalent bond
2.
octet rule
3.
double bond
4.
electronegativity
5.
polar covalent bond
9.
57.4 g of Fe
HI
4. O2
molecular shape = bent
6.
7.
20.
valence shell electron pair repulsion
theory (VSEPR)
bond angle
molarity
Review Exercises:
3.
5.
13.
4.
e- pair geometry (note: this is the "family" or "shape group" I refered to in lecture, I will
not ask you for this on the test, I will ask you for the molecular shape) tetrahedral;
molecular shape = trigonal pyramidal; bond angle is a little less than 109.5º (actual bond
angle = 107º)
2.00 g NaOH
14.
274 mL