Calculate the mole ratio of CH₃COONa to CH₃COOH required to make a buffer with pH of 4.83. K_a of CH₃COOH is 1.8 × 10^-5. A) 0.122 B) 3.00 C) 0.75 D) 1.22 E) 10.0

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Quizplus · Accepted Answer

The Henderson-Hasselbalch equation is used: pH = pKa + log([A-]/[HA]). pKa = -log(1.8 × 10^-5) = 4.74. Solving 4.83 = 4.74 + log([A-]/[HA]) gives [A-]/[HA] = 1.22.

Calculate the Mole Ratio of CH3COONa to CH3COOH Required to Make

Calculate the Mole Ratio of CH₃COONa to CH₃COOH Required to Make