Le Chatelier's Principle [H]

Le Chatelier's principle is a Higher tier topic in the AQA GCSE Chemistry specification. It allows you to predict how the position of equilibrium will shift when conditions are changed. Mastering this principle is essential for understanding industrial processes such as the Haber process and for answering questions about reversible reactions at equilibrium.

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Statement of Le Chatelier's Principle

Le Chatelier's principle states:

If a system at equilibrium is subjected to a change in conditions, the equilibrium position will shift to counteract (oppose) the change.

In other words, the system adjusts to partially undo the change that was made.