What a reaction rate graph shows
What a reaction rate graph shows

The rate of reaction tells you how quickly reactants are used up or products are formed. You can measure it by following mass loss, gas volume, or the time for a cross to disappear when a precipitate forms.
Step-by-step lessons on OCR GCSE Chemistry Controlling reactions. 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.