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Ionic Equilibrum question

2022 · Q108
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Ionic Equilibrum question

2022 · Q108

NEETChemistryIonic EquilibrumMCQ+4 / −1

0.01 M acetic acid solution is 1% ionised, then pH of this acetic acid solution is :

  1. A
    1
  2. B
    3
  3. C
    2
  4. D
    4
View written solutionFree

Correct answer: D

For weak acid (i.e. CH3COOH)

$[{H^ + }] = C\alpha $

$$ = 0.01 \times {1 \over {100}} = {10^{ - 4}}$$ M

$$pH = - \log {H^ + } = - \log {10^{ - 4}} = 4$$

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