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Buffer solution is destroyed when _____________(a) addition of weak base(b) addition of strong acid or base(c) addition of weak acid(d) addition of a saltThe question was posed to me in a job interview.My query is from Equilibrium in portion Equilibrium of Chemistry – Class 11

Answer»

Correct answer is (a) ADDITION of WEAK base

The best explanation: If the addition of a strong acid or base changes the pH of a buffer by unit, the buffer solution is assumed to be DESTROYED that is new pH = pKa ± 1; that MEANS [salt]/[acid] or [acid]/[salt] = 10 or 1/10.



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