Final answer:
A catalyst does not affect the position of an equilibrium, but it speeds up both the forward and reverse reactions, helping the reaction reach equilibrium faster.
Step-by-step explanation:
Adding a catalyst to this, or any other equilibrium system, will not affect the position of an equilibrium. A catalyst speeds up both the forward and the reverse reactions, so there is no uneven change in reaction rates. Generally, a catalyst will help a reaction to reach the point of equilibrium sooner, but it will not affect the equilibrium otherwise.