ACS Gen Chem 2 Final Exam
Study Guide 2026 | Complete
Questions and Guide Answers,
100% Verified Graded A+
C - ANSWER-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
C - ANSWER-Which molecule is most soluble in water?
D - ANSWER-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
B - ANSWER-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
D - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-Which 0.1 molal aqueous solution will have the lowest freezing
point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
Study Guide 2026 | Complete
Questions and Guide Answers,
100% Verified Graded A+
C - ANSWER-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
C - ANSWER-Which molecule is most soluble in water?
D - ANSWER-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
B - ANSWER-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
D - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-Which 0.1 molal aqueous solution will have the lowest freezing
point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
