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A salt solution shows pH 3. From which type of acid and base can this salt be formed?

Answer and explanation

Correct answer: Strong acid and weak base

The governing concept is salt hydrolysis. A pH of 3 is distinctly acidic, so the salt produces excess H3O+ ions in water. Salts formed from a strong acid and a weak base, such as ammonium chloride from HCl and NH4OH, commonly give acidic solutions because the conjugate acid of the weak base hydrolyses. A weak-acid/strong-base salt is basic, a strong/strong salt is approximately neutral, and weak/weak salts are not always neutral.

Related tags

Acidic-SaltSalt-HydrolysisPhStrong-AcidWeak-BaseAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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