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Which of the following salts forms a basic aqueous solution?

Answer and explanation

Correct answer: Na₂CO₃

Sodium carbonate, Na₂CO₃, is considered a salt of a strong base, sodium hydroxide, and a weak acid, carbonic acid. In water, the carbonate ion undergoes hydrolysis and produces hydroxide ions: CO₃²⁻ + H₂O ⇌ HCO₃⁻ + OH⁻. The OH⁻ ions make the solution basic, so option C is correct. NaCl is approximately neutral, NH₄Cl is acidic, and CuSO₄ is not the expected basic salt here.

Related tags

Sodium-CarbonateSalt-HydrolysisBasic-SolutionAcid-Base-SaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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