What molar ratio of acetic acid to sodium acetate is required to create a buffer solution having a pH of 4.93 at 25°C? K_a for HC₂H₃O₂ is 1.8 × 10^-5.

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Quizplus · Accepted Answer

The Henderson-Hasselbalch equation is used to calculate the pH of a buffer solution: pH = pKa + log([A-]/[HA]). Given pH = 4.93 and pKa = -log(1.8 × 10^-5) = 4.74, solving for the ratio [A-]/[HA] gives approximately 0.65.

What Molar Ratio of Acetic Acid to Sodium Acetate Is