Name
Chemistry: Kinetics & Equilibrium Review
Write the equilibrium expressions (for K) for the following reactions.
1. CO (g) + 2H2 (g)  CH3OH (g)
2. H2 (g) + I2 (g) 2HI (g)
3. CaSO4 (s)  Ca+2(aq) + SO4 -2 (aq)
4. 2HBr (g) H2 (g) + Br2 (l)
5. CO (g) + 2H2 (g) CH3OH (g)
For each of the following, write the equilibrium expression and solve for K. Show all work!!
6. PCl5(g) → PCl3(g) + Cl2(g). What is the equilibrium constant if the equilibrium concentrations are as
follows: PCl5 is 0.0096 mol/L, PCl3 is 0.0247 mol/L and Cl2 is 0.0247 mol/L?
7. At a given temperature, the Keq for the reaction 2HI(g) → H2(g) + I2(g) is 1.40 x 10-2. If the concentration of
both H2 and I2 at equilibrium are 2.00 x 10-4M, find the concentration of HI.
In each problem, calculate the missing concentration or constant at equilibrium.
8.
9.
10.
[HI]
1.78
X
0.78
[H2]
0.172
0.242
0.112
[I2]
0.172
0.242
X
Keq
X
0.217
2.06 x 10_2
Be sure to review what influences he rate of a reaction and Le Chatelier’s Principle!!!