1.

In the graph, energy is plotted as a function of reaction progress for a catalyzed and an uncatalyzed chemical reaction. Assign the terms to their corresponding features in the figure.

answer bank: activation energy , products, reactants
2.

How are the following aspects of a reaction affected by the addition of a catalyst?

Increased. Decreased. Not affected

answer bank: rate of the reverse reaction, activation energy of the reverse reaction, activation energy of the forward reaction, rate of the forward reaction

What other aspects of a catalyzed reaction are different from the uncatalyzed reaction?

THE MECHANISM

THE OVERALL REACTION

Δ𝐸RXN

3.

At 25 °C, only 0.0490 mol of the generic salt AB3 is soluble in 1.00 L of water.

What is the 𝐾sp of the salt at 25 °C?

AB3(s)↽−−⇀A3+(aq)+3B−(aq)

𝐾SP=

4.

The 𝐾sp of copper(II) carbonate, CuCO3, is 1.4×10−10. Calculate the molar solubility, 𝑆, of this compound.

𝑆=

M

5.

The 𝐾sp of iron(II) hydroxide, Fe(OH)2, is 4.87×10−17. Calculate the molar solubility, 𝑠, of this compound.

𝑠=

M

6.

Complete the 𝐾sp expression for Ag2CO3.

𝐾sp=8.46×10−12=

7.

Enter the solubility-product expression for Al(OH)3(s).

𝐾sp=

8.

For each event, indicate how the concentration of each species in the chemical equation will then change to reach equilibrium. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration.

2CO(g)	+	O2(g)	↽−−⇀	2CO2(g)
increasing the concentration of CO
increasing the concentration of CO2
decreasing the volume of the system

answer bank ; ↑↓
9.

Consider the reaction.PCl5(g)↽−−⇀PCl3(g)+Cl2(g)𝐾c=0.0420

The concentrations of the products at equilibrium are [PCl3]=0.260 M and [Cl2]=0.180 M. What is the concentration of the reactant, PCl5, at equilibrium?

[PCL5]=

M

10.

For the reaction2H2O(g)↽−−⇀2H2(g)+O2(g)

the equilibrium concentrations were found to be [H2O]=0.250 M, [H2]=0.340 M, and [O2]=0.750 M.

What is the equilibrium constant for this reaction?

𝐾C=

11.

For the reaction2H2O(g)↽−−⇀ 2H2(g)+O2(g)

the equilibrium concentrations were found to be [H2O]=0.250 M, [H2]=0.560 M, and [O2]=0.800 M. What is the equilibrium constant for this reaction?

𝐾EQ=

12.

Write the equilibrium constant expression for the reactionA(s)+3B(l)↽−−⇀2C(aq)+D(aq)

in terms of [A], [B], [C], and [D] as needed.

𝐾eq=

13.

Write the equilibrium-constant expression for the reaction shown in terms of [A], [B], [C], and [D].

3A(g)+B(g)↽−−⇀2C(g)+2D(g)

Note that 𝐾c, which is sometimes symbolized as 𝐾 or 𝐾eq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, 𝐾c means the same thing as 𝐾 and 𝐾eq.

𝐾c=

14.

Write the equilibrium-constant expression for the reaction shown in terms of [NO], [O2], and [NO2].2NO(g)+O2(g)↽−−⇀2NO2(g)

𝐾c, which is sometimes symbolized as 𝐾 or 𝐾eq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, 𝐾c means the same thing as 𝐾 and 𝐾eq.

𝐾c=