A student investigates how the concentration of reactant X affects the rate of a reaction that forms a solid product, P.
When the concentration of X is 0.20 mol/dm³, 12 g of P forms in 40 s.
The mean rate of formation of P changes in the same ratio as the concentration of X. Assume that P forms at a steady rate throughout each run, and that the temperature and all other variables are controlled.
Calculate the time taken to form 27 g of P when the concentration of X is 0.30 mol/dm³.
122 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.