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ChemistryEdexcel (9CH0)Equilibrium

Equilibrium & Le Chatelier's Principle — Edexcel Chemistry

Edexcel A-Level Chemistry

Chemical equilibrium is a core topic in Edexcel A-Level Chemistry. This interactive tool models dynamic equilibrium systems — adjust concentration, temperature, and pressure to see how the position of equilibrium shifts according to Le Chatelier's principle. Explore the equilibrium constant Kc and Kp, understand how changes in conditions affect the value of K versus the position of equilibrium, and practise writing equilibrium expressions. Includes the Haber process and Contact process as worked examples with exam-style questions.

Uses Google Fonts (DM Mono, Figtree). Requires an internet connection for full styling.

Frequently asked questions

What is Le Chatelier's principle?+
Le Chatelier's principle states that if a dynamic equilibrium is disturbed by changing the conditions (concentration, temperature, or pressure), the position of equilibrium shifts to counteract the change and partially restore the original conditions.
Does a catalyst affect the position of equilibrium?+
No. A catalyst increases the rate of both the forward and reverse reactions equally by providing an alternative reaction pathway with lower activation energy. It does not change the position of equilibrium or the value of K — it only allows equilibrium to be reached faster.

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