The pH of a solution that contains 0.818 M acetic acid (K_a= 1.76 × 10^-⁵) and 0.172 M sodium acetate is _. A) 8.57 B) 9.92 C) 4.08 D) 5.43 E) 8.37

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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]). For acetic acid, pKa = -log(1.76 × 10^-5) ≈ 4.75. Substituting the given concentrations: pH = 4.75 + log(0.172/0.818) ≈ 4.08.

The PH of a Solution That Contains 0