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What will be the approximate pH of the final solution in complete neutralisation of a strong acid and a strong base?

Answer and explanation

Correct answer: Seven

A strong acid supplies H⁺ ions and a strong base supplies OH⁻ ions. During complete neutralisation, they combine in equal effective amounts: H⁺ + OH⁻ → H₂O. The remaining ions form a neutral salt when the acid and base are suitably matched, so at about 25°C the final solution has pH close to 7. Thus option A is correct; pH 3 or 11 would indicate excess acid or base.

Related tags

NeutralisationPhStrong AcidStrong BaseAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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