JEE Main Chemistry question
Consider the reversible reaction, HCN(aq)⇌H⁺(aq)+CN⁻(aq). At equilibrium, the addition of CN⁻(aq) would:
Answer: (B)
Solution
Common-ion effect shifts equilibrium backward, lowering [H⁺] (K itself is unaffected).
Consider the reversible reaction, HCN(aq)⇌H⁺(aq)+CN⁻(aq). At equilibrium, the addition of CN⁻(aq) would:
Common-ion effect shifts equilibrium backward, lowering [H⁺] (K itself is unaffected).