Calculate the pH of a 0.010 M CH₃CO₂H solution.K_a = 1.8 × 10−⁵ for acetic acid.

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Quizplus · Accepted Answer

The pH of a weak acid solution can be calculated using the formula pH = -log[H⁺], where [H⁺] is the concentration of hydrogen ions. For acetic acid, [H⁺] can be found using the expression [H⁺] = √(Ka × [CH₃CO₂H]). Substituting the given values, [H⁺] = √(1.8 × 10⁻⁵ × 0.010) = 1.34 × 10⁻³. Therefore, pH = -log(1.34 × 10⁻³) ≈ 3.39.

Calculate the PH of a 0