Edexcel IGCSE Chemistry · Spec 3.12-3.14C
Catalysts & Reaction Profiles
How catalysts speed up reactions, shown on reaction profile diagrams.
Chemistry revision video
Catalysts & Reaction Profiles
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Spec 3.12-3.14C
What you need to know
- Say what a catalyst does
- Show a catalyst on a reaction profile
- Recognise enzymes as biological catalysts
Active recall
Quick check
Answer each question before opening the answer.
How does a catalyst speed up a reaction?
It provides an alternative reaction pathway with a lower activation energy.
Is a catalyst used up in the reaction?
No — it is chemically unchanged at the end.
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