Cambridge IGCSE Chemistry

6.2Rate of reaction

Rate of reaction in Cambridge IGCSE Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.

Subtopic42 practice questions2 lessons

Learning objectives

What the syllabus expects you to be able to do.

6.2.1Describe how the rate of a reaction is affected by changing the concentration of solutions, the pressure of gases, the surface area of solids and the temperature, and by adding or removing a catalyst (including enzymes).
6.2.2State that a catalyst increases the rate of a reaction and is unchanged at the end of the reaction.
6.2.3Describe practical methods of investigating the rate of a reaction, including following the change in mass of a reactant or product and the formation of a gas.
6.2.4Interpret data, including graphs, from rate of reaction experiments.
6.2.5Supplement: describe collision theory in terms of the number of particles per unit volume, the frequency of collisions, the kinetic energy of the particles and the activation energy, Ea.
6.2.6Supplement: use collision theory to describe and explain how concentration, gas pressure, surface area, temperature and catalysts (including enzymes) affect the rate of a reaction.
6.2.7Supplement: state that a catalyst lowers the activation energy, Ea, of a reaction.
6.2.8Supplement: evaluate practical methods of investigating the rate of a reaction, such as measuring a change in mass or the volume of gas formed.

A sample question on this topic. Answer it, check it, then read the worked answer.

Practise with instant marking, see your mastery grow and get a study plan built around your exam date.