Welcome to this deck on the rates of chemical reactions. We'll explore what the rate of reaction means, how to measure it, and how to calculate it from experimental data and graphs. We will also cover the key factors that can change the speed of a reaction, and explain these effects using a powerful idea called collision theory. Finally, we'll walk through the required practical for this topic. Mastering this is key for your GCSE Chemistry exam.

To calculate the rate of a reaction, you need to know two things: the amount of a reactant used up or product formed, and the time it took. The equation is simple: the mean rate of reaction equals the amount of reactant used, or product formed, divided by the time. For example, if you collect 10 cubic centimetres of a gas in 20 seconds, the rate is 10 divided by 20, which is 0.5 cubic centimetres per second.