What are catalysts?
2 marks · NormalGive two reasons why catalysts are important in industrial chemical processes.
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Also accept: Catalysts speed up reactions so products are made faster.; They reduce energy costs as less heat is needed, and can be reused for many reactions.
Common mistakes: Saying catalysts increase yield
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Marking points
B1 · 1 mark · States that catalysts increase the rate of reaction/make reactions faster.
B2 · 1 mark · Gives a second reason, eg. reduces energy requirements, cost savings, reused for many cycles.
Worked solution
Catalysts are important because: (1) they speed up chemical reactions, allowing products to be made faster, and (2) they reduce the amount of energy needed or can be reused, which helps lower manufacturing costs.