ACS GEN CHEM 2 FINAL EXAM 2026-2027
QUESTIONS AND CORRECT ANSWERS
GRADED A+
D
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
A
,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
D
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
A
Which 0.1 molal aqueous solution will have the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
, (D) NaCl
B
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
B
The rate law for the reaction
A + B --> C + D
is first order in [A] and second order in [B]. If [A] is halved and [B] is doubled, the
rate of the reaction will
(A) remain the same
QUESTIONS AND CORRECT ANSWERS
GRADED A+
D
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
A
,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
D
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
A
Which 0.1 molal aqueous solution will have the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
, (D) NaCl
B
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
B
The rate law for the reaction
A + B --> C + D
is first order in [A] and second order in [B]. If [A] is halved and [B] is doubled, the
rate of the reaction will
(A) remain the same
