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NTA Abhyas NEET2020ChemistryIonic EquilibriumPractice

The dissociation constant of a substituted benzoic acid is 1 . 0 × 10 - 4 at 25 o C . The pH of 0.01 M solution of its sodium salt is

Options

  1. A7
  2. B6
  3. C8
  4. D4

Correct answer

C. 8

Step-by-step solution

For a salt of a weak acid and strong base p H = 7 + 1 2 p K a + 1 2 l o g C = 7 + 1 2 − log   1 × 10 − 4 + 1 2 log 0.01 = 8 .

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