AQA GCSE Chemistry · 8462
Specification 4.4.2.6 · Paper 1
An acid that is completely ionised in aqueous solution.
Revise: Strong and Weak AcidsA strong acid is completely ionised in aqueous solution.
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GCSE Chemistry · key term
An acid that completely dissociates into ions in aqueous solution.
Used by AQA, Edexcel and OCR
Specification 4.4.2.6 · Paper 1
An acid that is completely ionised in aqueous solution.
Revise: Strong and Weak AcidsA strong acid is completely ionised in aqueous solution.
Specification 3.8 · Paper 1
Revise: Weak vs Strong AcidsA strong acid completely dissociates in aqueous solution.
Specification C3.3g, PAG 6 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
An acid for which all, or virtually all, of its particles ionise in aqueous solution.
Revise: Acid Strength and ConcentrationA solution can therefore contain a concentrated strong acid, a dilute strong acid, a concentrated weak acid or a dilute weak acid. This distinction matters because everyday language sometimes uses “strong” to mean concentrated, but that is not what strong acid means in chemistry.
A substance that ionises completely in water to produce hydrogen ions, .
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
An acid that ionises completely in water.
Revise: Weak/Strong vs Dilute/ConcentratedA strong acid ionises completely: its dissolved acid particles form ions. A weak acid ionises only partly: some particles form ions, while others remain as acid molecules. Hydrochloric acid is a strong acid; ethanoic acid is a weak acid.
Do not confuse strength with concentration: a strong acid ionises fully in water, whereas concentration describes the amount of dissolved acid per unit volume.
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