What is a catalyst?
What is a catalyst?
A catalyst is a substance that increases the rate of a chemical reaction without being used up. It provides an alternative reaction pathway with a lower activation energy.
Step-by-step lessons on AQA GCSE Chemistry 6.1.4 Catalysts. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.