Define reaction rate as the change in concentration of reactants or products per unit time.
Rate
= Dc/Dt
(Unit: mol∙dm-3.s-1).
Catalyst
Define the term catalyst as a substance that increases the rate of a chemical reaction without itself undergoing a permanent change
Function of a catalyst
A catalyst increases the rate of a reaction by providing an alternative path of lower activation energy. It therefore decreases the net activation energy
