What is the pH of a buffer solution that is 0.266 M in lactic acid and 0.111 M in sodium lactate? The K_a of lactic acid is 1.4 × 10^-4. A)14.38 B)10.53 C)5.38 D)3.47 E)4.23

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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(0.111/0.266) ≈ 3.47.

What Is the PH of a Buffer Solution That Is