Define a catalyst and explain a catalyst's role in a

chemicalreaction.

Catalyst is referred to as the substance used in the reaction to speed up or to increase the efficiency of the reaction. the catalyst itself does not alter any change during the reaction. As catalyst itself is not the reactant or product thus it does not appear in a chemical reaction

Explanation:

Catalyst is referred to as the substance used in the reaction to speed up or to increase the efficiency of the reaction. the catalyst itself does not alter any change during the reaction. As catalyst itself is not the reactant or product thus it does not appear in a chemical reaction

In a chemical reaction, the catalyst is used to decrease the activation energy thus to provide or enhance the reaction mechanism to the reaction.