ACS Gen Chem 2 Final Exam Study Guide
Actual Questions and Verified Answers
100% Guarantee Pass
1. Where is the hydrophilic (attracted to water) region of the molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
Answer: C
2. Which molecule is most soluble in water?
Answer: C
3. A solution of NaCl in water has a concentration of 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
Answer: D
4. What is the mole fraction of water in 200 g of 89% (by mass) ethanol,
C2H5OH?
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
Answer: B
5. A mixture of 100 g of K2Cr2O7 and 200 g of water 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
Answer: D
6. Carbonated beverages have a fizz because of gas dissolved in the solution.
What increases the concentration of gas in a solution?
(A) cooling the solution
(B) heating the solution
(C) increasing the volume of solution
(D) decreasing the volume of solution
Answer: A
7. When 100 g of an unknown compound was dissolved 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
Answer: D
8. Which 0.1 molal aqueous solution will have the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
Answer: A
9. What is the rate law of this reaction?
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
Answer: B
10. The rate law for the reaction
Actual Questions and Verified Answers
100% Guarantee Pass
1. Where is the hydrophilic (attracted to water) region of the molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
Answer: C
2. Which molecule is most soluble in water?
Answer: C
3. A solution of NaCl in water has a concentration of 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
Answer: D
4. What is the mole fraction of water in 200 g of 89% (by mass) ethanol,
C2H5OH?
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
Answer: B
5. A mixture of 100 g of K2Cr2O7 and 200 g of water 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
Answer: D
6. Carbonated beverages have a fizz because of gas dissolved in the solution.
What increases the concentration of gas in a solution?
(A) cooling the solution
(B) heating the solution
(C) increasing the volume of solution
(D) decreasing the volume of solution
Answer: A
7. When 100 g of an unknown compound was dissolved 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
Answer: D
8. Which 0.1 molal aqueous solution will have the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
Answer: A
9. What is the rate law of this reaction?
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
Answer: B
10. The rate law for the reaction
