What is the pH of a buffer solution that is 0.222 M in lactic acid and 0.132 M in sodium lactate? The K_a of lactic acid is 1.4 × 10^-4. A) 14.23 B) 10.38 C) 5.39 D) 3.62 E) 4.08

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The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). First, calculate pKa: pKa = -log(1.4 × 10^-4) ≈ 3.85. Then, apply the equation: pH = 3.85 + log(0.132/0.222) ≈ 3.62.

What Is the PH of a Buffer Solution That Is