4 x 1 hour lessons

This short but vital module focuses on chemical equilibrium in both qualitative and quantitative terms. You'll revise Le Chatelier’s Principle and how changing conditions affect the position of equilibrium, then build confidence in using equilibrium constants (Kc and Kp), including calculating them from experimental data and interpreting their values to explain chemical behaviour.

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By the end of this module you will be able to:

• explain dynamic equilibrium in closed systems

• use Le Chatelier’s Principle to predict how temperature, pressure, and concentration changes affect equilibrium position

• write and manipulate expressions for Kc and Kp

• calculate Kc and Kp from experimental data

• interpret values of Kc and Kp to assess the position of equilibrium

• explain how changing conditions affect Kc and Kp

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AQA Specification Points: 1.25 Chemical equilibria and Le Chatelier’s principle 1.26 Equilibrium constant Kc for homogeneous systems 1.32 Equilibrium constant Kp for homogeneous systems