How does the addition of catalyst affect the energy of activation of a chemical reaction?
When you add a catalyst on a chemical reaction, the reaction reaches an equilibrium state as the molecules touch each other to speed up the rate of the reaction. This makes the reactants to stick on the catalyst therefore increasing the speed. For more details refer to http://www.ehow.com/info_8609541_catalyst-affect-speeds-chemical-reactions.html.
A catalyst lowers the activation energy of a chemical reaction, facilitating the reaction.