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AIIMS2001ChemistryIonic Equilibrium

The pH value of decinormal solution of NH ₄ OH which is 20 % ionised is

Options

  1. A12.95
  2. B12.30
  3. C14.70
  4. D13.30

Correct answer

B. 12.30

Step-by-step solution

Concentration of NH ₄ OH solution =0.1 ~N Concentration of OH ⁻ ions in solution, aligned [ OH ⁻ ]=20 % of 0.1 ~N & = 20 100 0.1 & =0.02 ~N aligned array rlrl pOH =- [ OH ⁻ ] & =- (0.02) & =2-0.301=1.699 & & pH =14- pOH & =12.30 array

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