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Strong and Weak Acids and Bases

A strong acid completely dissociates into its ions in aqueous solution. Hydrochloric acid is an example of a strong acid.HCl(aq) → H+(aq) + Cl-(aq)A weak acid only partially dissociates in aqueous solution. Ethanoic acid is a weak acid.CH3COOH (aq) ⇌ CH3COO-(aq) + H+(aq)Note the use of → for a strong acid and ⇌ for a weak acid.

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Specification: Edexcel Chemistry (9CH0), A-level, Topic 12: Acid-base Equilibria. Topic: Acids, Bases and Buffers.

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