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Sodium chloride is a salt formed from acidic and basic sources. Why is the pH of its aqueous solution about 7?

Answer and explanation

Correct answer: It is formed from a strong acid and a strong base

Sodium chloride is formed by neutralisation of hydrochloric acid, HCl, a strong acid, with sodium hydroxide, NaOH, a strong base: HCl + NaOH → NaCl + H₂O. The Na⁺ and Cl⁻ ions do not hydrolyse appreciably in water, so the solution remains nearly neutral with pH close to 7. Option A is correct. Salts from weak acids or weak bases generally produce acidic or basic solutions instead.

Related tags

Sodium ChlorideNeutral SaltPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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