Catalyst

[hayley prinstein 2I]

If a reaction is catalyzed can this change its reaction order?

[Amber Shanks 2K]

No, adding a catalyst does not change the reaction order. If a reaction is 2nd order with respect to that reactant, adding a catalyst will not change the second order reaction, however, it would change the rate constant and thus the overall rate expression for the reaction.

[Gavin_Postiff_2I]

I believe that only zero-order reactions have catalysts being used as they are not dependent on concentrations, but rather the k which is determined by the catalyst. Due to them only being involved in zero-order reactions I am pretty sure they don't change the reaction order.