A student investigated the reaction between calcium carbonate chips and dilute hydrochloric acid.
CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g) \text{CaCO}_3\text{(s)} + 2\text{HCl(aq)} \rightarrow \text{CaCl}_2\text{(aq)} + \text{H}_2\text{O(l)} + \text{CO}_2\text{(g)} CaCO3(s)+2HCl(aq)→CaCl2(aq)+H2O(l)+CO2(g)The student repeated the experiment at a higher temperature and observed that the rate of reaction increased.
Explain, in terms of particles and collision theory, why the rate of reaction increases when the temperature is increased.
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.