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MHT CET2009ChemistryIonic Equilibrium

The degree of dissociation of a 0.01 M weak acid is 10⁻³ . Its pOH is

Options

  1. A5
  2. B3
  3. C9
  4. D11

Correct answer

C. 9

Step-by-step solution

[ H ⁺ ]= K_ a C =139 Or = ² C² [ K_ a = ² C ] aligned =& (10⁻³ )² (0.01)² =& 10⁻⁵ pH =- [ H ⁺ ] &=- 10⁻⁵ &=5 aligned pOH =14-5=9

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