ACS General Chemistry 2 Final Exam Prep (2026–2028) | Gen Chem 2 Standardized Practice Questions & Complete Study Guide

ACS General Chemistry 2 (Gen Chem 2) Final Exam 2026 | Practice
Test Questions & Answers | Complete Study Guide
Prepare for the ACS General Chemistry 2 (Gen Chem 2) Final Exam with this comprehensive
study guide featuring practice questions, verified answers, and detailed rationales. This resource
covers essential topics including chemical kinetics, chemical equilibrium, acids and bases,
buffers, solubility, thermodynamics, electrochemistry, nuclear chemistry, and coordination
compounds. Designed to reinforce fundamental chemistry concepts and improve exam readiness,
the material reflects the key content areas commonly assessed on the ACS Gen Chem 2 Final
Examination. Ideal for college students seeking a reliable resource to strengthen their
understanding, build confidence, and achieve success on the ACS Chemistry final exam.

C - CORRECT 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

QUESTION :C - CORRECT ANSWER Which molecule is most soluble in water?

QUESTION :D - CORRECT 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

QUESTION :B - CORRECT 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

QUESTION :D - CORRECT 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

QUESTION :A - CORRECT 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

QUESTION :D - CORRECT 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

QUESTION :A - CORRECT ANSWER Which 0.1 molal aqueous solution will have
the lowest freezing point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl

QUESTION :B - CORRECT ANSWER 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

QUESTION :B - CORRECT ANSWER 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
(B) be increased by a factor of 2

,(C) be increased by a factor of 4
(D) be increased by a factor of 8

QUESTION :C - CORRECT ANSWER The half-life for the first order conversion of
cyclobutene to ethylene,
C4H8 (g) --> 2C2H4 (g)
is 22.7 s at a particular temperature. How many seconds are needed for the partial
pressure of cyclobutane to decrease from 100 mmHg to 10 mmHg?

(A) 0.101 s
(B) 52.0 s
(C) 75.5 s
(D) 5233 s

QUESTION :A - CORRECT ANSWER The half-life for the first-order radioactive
decay of 32P is 14.3 days. How many days would be required for a sample of a radio
pharmaceutical containing 32P to decrease to 20.0% of its initial activity?

(A) 33.0 d
(B) 49.2 d
(C) 71.0 d
(D) 286 d

QUESTION :D - CORRECT ANSWER Plots are shown for the reaction N02 (g) -->
NO (g) + 1/2 O2 (g)

What is the rate law for the reaction?

(A) rate = k
(B) rate = k x 1/[NO2]
(C) rate = k[NO2]
(D) rate = k[NO2]^2

QUESTION :A - CORRECT ANSWER What changes when a catalyst is added to
the reaction described by this energy diagram?

(A) I and II
(B) I and III
(C) I only
(D) III only

QUESTION :C - CORRECT ANSWER Which statement regarding chemical
reactions is true according to collision theory?

(A) All molecular collisions result in chemical equations.
(B) Catalysts make individual collisions more effective, increasing reaction rates.

, (C) Proper orientation of molecules is required for collision to result in chemical
reactions.
(D) Increasing the temperature of a reaction decreases the kinetic energy of molecules,
making collisions more effective.

QUESTION :B - CORRECT ANSWER The activation energy for a particular reaction
is 83.1 kJ/mol. By what factor will the rate constant increase when the temperature is
increased from 550.0 degrees C to 60.0 degrees C?

(A) 2.53
(B) 1.00
(C) 0.927
(D) 0.395

QUESTION :C - CORRECT ANSWER Consider the reaction.
2NO2 (g) + F2 (g) <--> 2 NO2F (g)
A proposed mechanism for the reaction is
NO2 + F2 <--> NO2F + F (slow)
NO2 + F <--> NO2F (fast)

What is the rate law for this mechanism?

QUESTION :A - CORRECT ANSWER Consider this equilibrium:
2SO2 (g) + O2 (g) <--> 2SO3 (g)
The forward reaction is proceeding at a certain rate at some temperature and pressure.
When the pressure is increased, what might we expect for the forward reaction?

(A) a greater rate of reaction and a greater yield of SO3 at equilibrium
(B) a greater rate of reaction and a same yield of SO3 at equilibrium
(C) a lesser rate of reaction and a smaller yield of SO3 at equilibrium
(D) a lesser rate of reaction and a greater yield of SO3 at equilibrium

QUESTION :A - CORRECT ANSWER What is the equilibrium expression for this
reaction?
Ni(CO)4 (g) <--> Ni (s) + 4CO (g)

QUESTION :C - CORRECT ANSWER Given the reaction and equilibrium constant:
2SO3 (g) <--> 2SO2 (g) + O2 (g)
Ke = 2.3 x 10^-7

What is the equilibrium constant for this reaction at the same temperature?
SO3 (g) <--> SO2 (g) + 1/2 O2 (g)
Ke = ?

(A) 1.2 x 10^-7
(B) 4.6 x 10^-7