Which salt produces a basic aqueous solution when dissolved in pure water?
Answer and explanation
Correct answer: C. CH₃COONa
- Step 1: Analyze parent acid and base: CH₃COONa is formed from a weak acid (CH₃COOH) and a strong base (NaOH).
- Step 2: The acetate anion undergoes basic hydrolysis: , generating hydroxide ions and yielding .
Answer
CH₃COONa.
Why not the others: NH₄Cl is acidic (weak base NH₃ + strong acid HCl); NaCl and KNO₃ are neutral salts derived from strong acids and strong bases.
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