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Question 600415
JEE Chemistry · Medium

Chemical and Ionic Equilibrium: Henderson-Hasselbalch MCQ

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Henderson-HasselbalchMediumQuestion 600415

Question

A buffer contains 0.1 M acetic acid (pKa = 4.74) and 0.1 M sodium acetate. The pH of the buffer is:
  1. A
    4.74
    Correct
  2. B
    7
  3. C
    3.74
  4. D
    5.74

Correct answer

4.74

Explanation

pH = pKa + log([CH₃COO⁻]/[CH₃COOH]) = 4.74 + log(0.1/0.1) = 4.74 + 0 = 4.74.

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