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The degree of dissociation of acetic acid in a 0 .1 M solution is 1.0 × 1 0 – 2 . The p K a of acetic acid value.

Options

  1. A3
  2. B4
  3. C5
  4. D6

Correct answer

C. 5

Step-by-step solution

K a = C α 2 1 - α = 0.1 × 1 0 - 2 2 1 - 0.01 = 1.01 × 1 0 - 5 p K a = - log ⁡ 1 × 1 0 - 5 = 5

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