Mean rate of reaction
Mean rate of reaction
The rate of reaction describes how quickly a reactant is used up or a product is formed. The mean rate over a time interval is calculated from the change in amount divided by the time taken.
Step-by-step lessons on OCR GCSE Chemistry 5.2.1 Measuring and interpreting rate of reaction. 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.