Which method is suitable for following a reaction that releases a gas from an open flask?
Measure the increase in mass at regular time intervals
Measure the decrease in mass at regular time intervals
Measure the total mass once, when the reaction has finished
Record the temperature at regular time intervals
127 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.