JEE Main Chemistry question
pH of a solution of the mixture of 0.1 N HCl and 0.1 N CH₃COOH is:
Answer: (A)
Solution
[H⁺] is dominated by the fully-dissociated strong acid (≈0.1 M), with the weak acid's own ionization suppressed by the common H⁺ ion; pH≈1.