WAEC Chemistry 2018 Theory — Question 5

Question 5 of 24 from the West African Examinations Council (WAEC) Chemistry 2018 Theory paper, with the correct answer and a full explanation.

1.(e) Explain briefly how a catalyst increases the rate of a chemical reaction.

Model answer

A catalyst increases the rate of a chemical reaction by lowering the activation energy of the reaction; it achieves this by providing an alternative reaction pathway that requires less energy.

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