ACS Gen Chem 2 Final Exam Questions
and Answers (Latest 2026)
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 - Correct
Answers ✅C
Which molecule is most soluble in water? - Correct Answers
✅C
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 - Correct Answers ✅D
What is the mole fraction of water in 200 g of 89% (by mass)
ethanol, C2H5OH?
,ACS Gen Chem 2 Final Exam Questions
and Answers (Latest 2026)
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76 - Correct Answers ✅B
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 - Correct Answers ✅D
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
, ACS Gen Chem 2 Final Exam Questions
and Answers (Latest 2026)
(D) decreasing the volume of solution - Correct Answers
✅A
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 - Correct Answers ✅D
Which 0.1 molal aqueous solution will have the lowest
freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl - Correct Answers ✅A
What is the rate law of this reaction?
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
and Answers (Latest 2026)
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 - Correct
Answers ✅C
Which molecule is most soluble in water? - Correct Answers
✅C
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 - Correct Answers ✅D
What is the mole fraction of water in 200 g of 89% (by mass)
ethanol, C2H5OH?
,ACS Gen Chem 2 Final Exam Questions
and Answers (Latest 2026)
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76 - Correct Answers ✅B
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 - Correct Answers ✅D
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
, ACS Gen Chem 2 Final Exam Questions
and Answers (Latest 2026)
(D) decreasing the volume of solution - Correct Answers
✅A
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 - Correct Answers ✅D
Which 0.1 molal aqueous solution will have the lowest
freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl - Correct Answers ✅A
What is the rate law of this reaction?
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
