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Edexcel IGCSE·Science·IGCSE Science (Double Award)

Acids, Bases & Reactions

13 min read

The pH scale, reactions of acids, salts, and tests for gases and ions.

Acids and bases

Acids release H⁺ (pH < 7); alkalis release OH⁻ (pH > 7); neutral = 7. Neutralisation: H⁺ + OH⁻ → H₂O.

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