What is the pH of a buffer solution that is 0.211 mol L^-1 in lactic acid and 0.111 mol L^-1 in sodium lactate? The K_a of lactic acid is 1.4 × 10^-4. A)14.28 B)10.43 C)5.48 D)3.57 E)4.13

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Quizplus · Accepted Answer

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). Here, pKa = -log(1.4 × 10^-4) = 3.85. Plugging in the concentrations, pH = 3.85 + log(0.111/0.211) = 3.57.

What Is the PH of a Buffer Solution That Is