Maricela 1115 Views May 29, 2016, 06:19:07 PM Question Solved Share Tweet How is a catalyst defined, and how does such a species increase the reaction rate? What will be an ideal response? Isreal May 29, 2016, 06:30:37 PM #1 Answer A catalyst is a chemical species that increases the rate of a chemical reaction without being consumed during the reaction. The catalyst serves to set up an additional reaction coor-dinate for which the activation energy is reduced relative to the uncatalyzed reaction. Dorris May 29, 2016, 06:37:00 PM #2 Thanks for helping me.