CHEM II LAB FINAL REVIEW!1!!!1!

Which of the following statements is FALSE?

A) When K >> 1, the forward reaction is favored and essentially goes to completion.

B) When K << 1, the reverse reaction is favored and the forward reaction does not proceed to a great

extent.

C) When K ≈ 1, neither the forward or reverse reaction is strongly favored, and about the same amount of

reactants and products exist at equilibrium.

D) K >> 1 implies that the reaction is very fast at producing products.

E) None of the above

D) K >> 1 implies that the reaction is very fast at producing products.

Express the equilibrium constant for the following reaction.

CH4(g) + 2 O2(g) ⇔ CO2(g) + 2 H2O(g)

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The reaction below has a Kp value of 3.8 × 10-5. What is the value of Kc for this reaction at 700 K?

2 SO3(g) ⇌ 2 SO2(g) + O2(g)

A) 6.6 × 10-7

B) 1.5 × 106

C) 3.3 × 10-5

D) 3.0 × 104

E) 2.7 × 10-2

A) 6.6 × 10-7

Consider the following reaction at equilibrium. What effect will increasing the pressure of the reaction

mixture have on the system?

2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)

A) The reaction will shift to the right in the direction of products.

B) No effect will be observed.

C) The reaction will shift to the left in the direction of reactants.

D) The equilibrium constant will decrease.

E) The equilibrium constant will increase

A) The reaction will shift to the right in the direction of products.

Consider the following reaction at equilibrium. What effect will removing H2O have on the system?

2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)

A) The reaction will shift to the left.

B) No change will be observed.

C) The equilibrium constant will decrease.

D) The equilibrium constant will increase.

E) The reaction will shift in the direction of product

E) The reaction will shift in the direction of product

Consider the following reaction at equilibrium. What effect will adding more NO2 have on the

system?

SO2(g) + NO2(g) ⇌ SO3(g) + NO(g)

A) The reaction will shift in the direction of products.

B) The reaction will shift to decrease the pressure.

C) No change will occur since SO3 is not included in the equilibrium expression.

D) The reaction will shift in the direction of reactants.

E) The equilibrium constant will decrease.

A) The reaction will shift in the direction of products.

The following reaction is exothermic. Which change will shift the equilibrium to the left?

2 SO2(g) + O2(g) ⇌ 2 SO3(g)

A) raising the temperature

B) adding SO3

C) removing O2

D) all of the above

E) none of the above

D) all of the above

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows:

[N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.

2 N2(g) + O2(g) ⇌ 2 N2O(g)

A) 2.2 × 10-19

B) 4.5 × 1018

C) 2.0 × 10-37

D) 5.0 × 1036

E) 4.9 × 10-17

C) 2.0 × 10-37

Give the expression for the solubility product constant for PbCl2

c

Calculate the solubility (in g/L) of silver chromate in water at 25°C if the Ksp for Ag2CrO4 is 1.1 ×10-12 .

A) 3.5 × 10-4 g/L '

B) 2.2 × 10-2 g/L

C) 2.7 × 10-2 g/L

D) 3.4 × 10-2 g/L

B) 2.2 × 10-2 g/L