A student adds 5 g of calcium carbonate chips to 50 cm350\,\mathrm{cm^{3}}50cm3 of dilute hydrochloric acid and measures the volume of carbon dioxide produced until the reaction stops. Some chips are left unreacted at the end.
The experiment is repeated with 10 g of the same chips and 50 cm350\,\mathrm{cm^{3}}50cm3 of the same acid. All other conditions are unchanged.
Which statement correctly compares the second experiment with the first?
The initial rate is greater and the final carbon dioxide volume is unchanged.
The initial rate is unchanged and the final carbon dioxide volume is greater.
The initial rate is unchanged and the final carbon dioxide volume is unchanged.
The initial rate is greater and the final carbon dioxide volume is greater.
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.