Calculate the pH of a 1.60 M NaCH₃CO₂ solution.K_a for acetic acid,CH₃CO₂H,is 1.8 × 10^-5. A) 2.27 B) 4.53 C) 9.47 D) 11.73

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Quizplus · Accepted Answer

NaCH₃CO₂ is a salt of a weak acid (CH₃COOH) and a strong base (NaOH), so it forms a basic solution. The pH can be calculated using the formula for the hydrolysis of the acetate ion: pH = 14 - 0.5(pKa - log C), where C is the concentration of the salt. Using pKa = -log(1.8 × 10⁻⁵) ≈ 4.74 and C = 1.60 M, the pH ≈ 9.47.

Calculate the PH of a 1