ACS GEN CHEM 2 FINAL EXAM ALL QUESTIONS AND CORRECT DETAILED ANSWERS NEWLY UPDATED VERSION FOR | ALREADY A GRADED

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ACS GEN CHEM 2 FINAL EXAM ALL QUESTIONS
AND CORRECT DETAILED ANSWERS NEWLY
UPDATED VERSION FOR 2025-2026 | ALREADY A
GRADED



1. C: 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

2. C: Which molecule is most soluble in water?




3. D: A solution of NaCl in water has a concentration of 20.5% by mass. What is the molal concentration of t
solution?

Molar Mass NaCl = 58.44 g/mol

(A) 0.205 m
(B) 0.258 m
(C) 3.51 m
(D) 4.41 m


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4. B: 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
5. 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 ott 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






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(C) 31 g
(D) 62 g




6. 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
7. 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
8. A: Which 0.1 molal aqueous solution will have the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
9. B: What is the rate law of this