A student mixes two solutions. The mixture is orange at first but becomes colourless during the reaction.
Which set of measurements would allow the rate of this reaction to be determined?
Time how long the mixture takes to hide a mark placed beneath it
Measure the time taken to mix the two solutions together
Record the volume of the mixture at regular time intervals
Record the colour intensity of the mixture at regular time intervals
122 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.