Question

What is the role of a catalyst in a chemical reaction? [2 Marks]

Answer 1

i) A catalyst is a substance that alters the rate of a chemical reaction, without itself being consumed during the reaction. [1 Mark]
ii) In a catalytic reaction, the speed of a reaction is influenced by catalyst. For example, iron is used as a catalyst in the manufacture of ammonia using Haber's process. [1 Mark]