What is a catalyst?
What is a catalyst?
A catalyst is a substance that increases the rate of a reaction without being used up. Its mass is the same at the end of the reaction as it was at the start.
Step-by-step lessons covering AQA GCSE Chemistry 6.1.4 Catalysts for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.
