ACS Gen Chem 2 Final Exam Study Guide
1. Where is the hydrophilic (attracted to water) region of C
the molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
2. Which molecule is most soluble in water? C
3. A solution of NaCl in water has a concentration of D
20.5% by mass. What is the molal concentration of the
solution?
Molar Mass NaCl = 58.44 g/mol
(A) 0.205 m
(B) 0.258 m
(C) 3.51 m
(D) 4.41 m
4. What is the mole fraction of water in 200 g of 89% (by B
mass) ethanol, C2H5OH?
, ACS Gen Chem 2 Final Exam Study Guide
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
5. A mixture of 100 g of K2Cr2O7 and 200 g of water D
is stirred at 60 degrees C until no more of the salt
dissolves. The resulting solution is poured off into a
separate beaker, leaving the undissolved solid behind.
The solution is now colled to 20 degrees C. What mass
of K2Cr2O7 crystallizes from the solution during the
cooling?
(A) 9 g
(B) 18 g
(C) 31 g
(D) 62 g
6. Carbonated beverages have a fizz because of gas dis- A
solved in the solution. What increases the concentra-
tion of gas in a solution?
(A) cooling the solution
(B) heating the solution
, ACS Gen Chem 2 Final Exam Study Guide
(C) increasing the volume of solution
(D) decreasing the volume of solution
7. When 100 g of an unknown compound was dissolved D
in 1.00 kg of water, the freezing point was lowered by
6.36 degrees C. What is the identity of this unknown
compound?
Kf for water = 1.86 degrees C/m
(A) CsCl
(B) KCl
(C) LiF
(D) NaCl
8. Which 0.1 molal aqueous solution will have the lowest A
freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
9. What is the rate law of this reaction? B
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
(A) rate = k[H2]^2 [NO]
(B) rate = k[H2] [NO]^2
(C) rate = k[H2]^2 [NO]^2
(D) rate = k[N2] [H2O]^2 / [H2]^2 [NO]^2
10. The rate law for the reaction B
A + B --> C + D
1. Where is the hydrophilic (attracted to water) region of C
the molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
2. Which molecule is most soluble in water? C
3. A solution of NaCl in water has a concentration of D
20.5% by mass. What is the molal concentration of the
solution?
Molar Mass NaCl = 58.44 g/mol
(A) 0.205 m
(B) 0.258 m
(C) 3.51 m
(D) 4.41 m
4. What is the mole fraction of water in 200 g of 89% (by B
mass) ethanol, C2H5OH?
, ACS Gen Chem 2 Final Exam Study Guide
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
5. A mixture of 100 g of K2Cr2O7 and 200 g of water D
is stirred at 60 degrees C until no more of the salt
dissolves. The resulting solution is poured off into a
separate beaker, leaving the undissolved solid behind.
The solution is now colled to 20 degrees C. What mass
of K2Cr2O7 crystallizes from the solution during the
cooling?
(A) 9 g
(B) 18 g
(C) 31 g
(D) 62 g
6. Carbonated beverages have a fizz because of gas dis- A
solved in the solution. What increases the concentra-
tion of gas in a solution?
(A) cooling the solution
(B) heating the solution
, ACS Gen Chem 2 Final Exam Study Guide
(C) increasing the volume of solution
(D) decreasing the volume of solution
7. When 100 g of an unknown compound was dissolved D
in 1.00 kg of water, the freezing point was lowered by
6.36 degrees C. What is the identity of this unknown
compound?
Kf for water = 1.86 degrees C/m
(A) CsCl
(B) KCl
(C) LiF
(D) NaCl
8. Which 0.1 molal aqueous solution will have the lowest A
freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
9. What is the rate law of this reaction? B
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
(A) rate = k[H2]^2 [NO]
(B) rate = k[H2] [NO]^2
(C) rate = k[H2]^2 [NO]^2
(D) rate = k[N2] [H2O]^2 / [H2]^2 [NO]^2
10. The rate law for the reaction B
A + B --> C + D
