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activation energy
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=