A student investigates the rate of reaction between calcium carbonate chips and dilute hydrochloric acid. They place the reaction flask on a digital mass balance to monitor the loss in mass as carbon dioxide gas escapes.
State how the student will know from the digital mass balance readings that the reaction has finished.
87 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.