Reaction Rates and Reversible Reactions

Syllabus tag: KCSE | Chemistry | Form 4 | Topic 20 Reaction Rates and Reversible Reactions

Lesson objectives

By the end of this topic, you should be able to:

• Define rate of reaction and describe how it is measured.
• Explain the factors affecting rate using the collision theory.
• Interpret rate graphs and describe the action of catalysts.
• Explain dynamic equilibrium and apply Le Chatelier's principle.

Summary

The rate of reaction is the change in concentration of a reactant or product per unit time. It is increased by raising concentration, pressure, temperature and surface area, and by a catalyst — all explained by the collision theory. In a reversible reaction at dynamic equilibrium, Le Chatelier's principle predicts the effect of any change.