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Which of the following salts will give highest pH in water

Which Of The Following Salts Will Give Highest Ph In Chemistry Question

Which of the following salts will give highest pH in water

Options

(a) KCl
(b) NaCl
(c) Na₂CO₃
(d) CuSO₄

Correct Answer:

Na₂CO₃

Explanation:

Na₂CO₃ is a salt of strong base (NaOH) and weak acid (H₂CO₃). On hydrolysis this salt will produce strongly basic solution. i.e pH will be highest (pH>7) for this solution. Others are combination of
KCl= strong acid +strong base →neutral solution (pH≈7)
Nacl= strong acid +strong base →neutral solution (pH≈7)
CuSO₄= strong acid + weak base → Acidic solution (pH<7)

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Topics: Equilibrium (104)
Subject: Chemistry (2512)

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