In the human body, the enzyme carbonic anahydrase catalyzes the interconversion

Question

In the human body, the enzyme carbonic anahydrase catalyzes the interconversion of CO2 and HCO?3 , bicarbonate ion, by either adding or removing the hydroxide anion. The overall reaction is endothermic. Show how the following affect the amount of carbon dioxide. The equilibrium equation is shown here: CO2 + OH? <--> HCO?3. Select the correct answers for all parts.

Part A   

increasing the amount of bicarbonate anion;

Has no effect.

Part B

increasing the pressure of carbon dioxide;

Has no effect.

Part C

increasing the amount of carbonic anhydrase;

Has no effect.

Part D

decreasing the temperature.

Equilibrium shifts to the reactants. Equilibrium shifts to the products.

Has no effect.

Part B

increasing the pressure of carbon dioxide;

Equilibrium shifts to the reactants. Equilibrium shifts to the products.

Has no effect.

Part C

increasing the amount of carbonic anhydrase;

Equilibrium shifts to the reactants. Equilibrium shifts to the products.

Has no effect.

Part D

decreasing the temperature.

Equilibrium shifts to the reactants. Equilibrium shifts to the products. Has no effect.

Explanation / Answer

Part A: adding product will cause reaction to shift towards reactants Per Le Chatelier principle.

part B. Adding reactant shifts reaction toward products.

part C: catalysts have no effect on the position of equilibrium.

part D: endothermic reactions absorb heat as a reactant. Lowering temperature removes heat so reaction shifts toward reactants.

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