Q: A student dissolves 0.5 mol of NaCl in 1 kg of water. What is the expected freezing point depression, given $$K_f$$ for water is $$1.86\ \mathrm{^\circ C\ kg\ $$mol^{-1}$$}$$? (Assume complete dissociation of NaCl.)

$$1.86\ \mathrm{^\circ C} \times 2 = 3.72\ \mathrm{^\circ C}$$

Q: A buffer solution is prepared by mixing acetic acid and sodium acetate. Which equation best describes the pH of this buffer?

$$\mathrm{pH} = \mathrm{p}K_a + \log\left(\frac{[\text{Base}]}{[\text{Acid}]}\right)$$

Q: A solution is prepared by dissolving 0.1 mol of glucose (a non-electrolyte) in 1 kg of water. What is the boiling point elevation, given $$K_b$$ for water is $$0.512\ \mathrm{^\circ C\ kg\ $$mol^{-1}$$}$$?

$$0.512\ \mathrm{^\circ C} \times 0.1 = 0.0512\ \mathrm{^\circ C}$$

Question 1

Which of the following statements best describes a colligative property of solutions?

Accepted Answer

It depends only on the number of solute particles present.

Question 2

A student dissolves 0.5 mol of NaCl in 1 kg of water. What is the expected freezing point depression, given $$K_f$$ for water is $$1.86\ \mathrm{^\circ C\ kg\ $$mol^{-1}$$}$$? (Assume complete dissociation of NaCl.)

Accepted Answer

$$1.86\ \mathrm{^\circ C} 	imes 2 = 3.72\ \mathrm{^\circ C}$$

Question 3

Which of the following best explains why ice floats on water?

Accepted Answer

Hydrogen bonding in ice creates an open lattice, making it less dense than liquid water.

Question 4

A reaction is found to be first order with respect to reactant A and second order with respect to reactant B. Which is the correct rate law for this reaction?

Accepted Answer

$$	ext{Rate} = k[A][B]^2$$

Question 5

Which of the following changes will increase the rate of a chemical reaction according to collision theory?

Accepted Answer

Increasing the concentration of reactants.

Question 6

At equilibrium, which of the following statements is true for a chemical reaction?

Accepted Answer

The rates of the forward and reverse reactions are equal.

Question 7

A buffer solution is prepared by mixing acetic acid and sodium acetate. Which equation best describes the pH of this buffer?

Accepted Answer

$$\mathrm{pH} = \mathrm{p}K_a + \log\left(\frac{[	ext{Base}]}{[	ext{Acid}]}ight)$$

Question 8

During a titration of a strong acid with a strong base, what is the pH at the equivalence point?

Accepted Answer

pH = 7

Question 9

Which of the following is a correct expression for the equilibrium constant $$K_c$$ for the reaction $$aA + bB \rightleftharpoons cC + dD$$?

Accepted Answer

$$K_c = \frac{[C]^c [D]^d}{[A]^a [B]^b}$$

Question 10

Which of the following best describes the effect of increasing temperature on an endothermic reaction at equilibrium?

Accepted Answer

The equilibrium shifts toward the products.

Question 11

A solution is prepared by dissolving 0.1 mol of glucose (a non-electrolyte) in 1 kg of water. What is the boiling point elevation, given $$K_b$$ for water is $$0.512\ \mathrm{^\circ C\ kg\ $$mol^{-1}$$}$$?

Accepted Answer

$$0.512\ \mathrm{^\circ C} 	imes 0.1 = 0.0512\ \mathrm{^\circ C}$$

Question 12

Which of the following is true about the entropy ($$\Delta S) of a $$system when a solid melts to form a liquid?

Accepted Answer

$$\Delta S is $$positive because disorder increases.

Question 13

Which equation correctly relates Gibbs free energy change ($$\Delta G) to $$enthalpy ($$\Delta H$$), entropy ($$\Delta S$$), and temperature ($$T$$)?

Accepted Answer

$$\Delta G = \Delta H - T\Delta S$$

Question 14

Which of the following best describes the function of a catalyst in a chemical reaction?

Accepted Answer

It provides an alternative pathway with lower activation energy.

Question 15

Which of the following is the correct cell notation for a galvanic cell with zinc and copper electrodes?

Accepted Answer

$$\mathrm{Zn}(s) | \mathrm{Zn}^{2+}(aq) || \mathrm{Cu}^{2+}(aq) | \mathrm{Cu}(s)$$

Question 16

Which of the following is the correct Nernst equation for calculating the cell potential ($$E) at $$non-standard conditions?

Accepted Answer

$$E = E^\circ - \frac{RT}{nF} \ln Q$$

Question 17

Which of the following statements about nuclear chemistry is correct?

Accepted Answer

Beta decay converts a neutron into a proton.

Question 18

A solution contains $$0.01\ \mathrm{M}$$ $$\mathrm{HCl}. $$What is the pH of the solution?

Accepted Answer

$$\mathrm{pH} = 2$$

Question 19

Which of the following best describes the solid state structure of sodium chloride ($$\mathrm{NaCl}$$)?

Accepted Answer

It forms a face-centered cubic lattice of alternating $$\mathrm{Na^+}$$ and $$\mathrm{Cl^-}$$ ions.

General Chemistry II (CHEM 116) Syllabus and Course Structure – Spring 2025

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