Calculate the pH of a 0.800 M NaCH₃CO₂ solution.K_a for acetic acid,CH₃CO₂H,is 1.8 × 10^-5. A)2.42 B)4.68 C)9.32 D)11.58

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Quizplus · Accepted Answer

NaCH₃CO₂ is a salt of a weak acid (CH₃COOH) and a strong base (NaOH). It hydrolyzes in water to form OH⁻ ions, making the solution basic. The pH can be calculated using the formula pH = 14 - 0.5(pKa - log C), where C is the concentration of the salt. Substituting the given values, pKa = -log(1.8 × 10⁻⁵) ≈ 4.74, and C = 0.800 M, we find pH ≈ 9.32.

Calculate the PH of a 0