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NEET 2022
Exam
NEET
Year
2022
Subject
Chemistry
Chapter
Ionic Equilibrium

NEET 2022 · Chemistry · Ionic Equilibrium

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

0.01M0.01 \mathrm{M} acetic acid solution is 1%1 \% ionised, then pH\mathrm{pH} of this acetic acid solution is :

Options

  1. A3
  2. B2
  3. C4
  4. D1

Correct answer

C. 4

Step-by-step solution

Ionisation of CH3COOH\mathrm{CH}_3 \mathrm{COOH} is 1%1 \% in aqueous solution. So, [H+]=1100×\left[\mathrm{H}^{+}\right]=\frac{1}{100} \times concentration of CH3COOH\mathrm{CH}_3 \mathrm{COOH}=1100×10−2=10−4pH=−log⁡[H+]=−log⁡(1×10−4)pH=4\begin{aligned} & =\frac{1}{100} \times 10^{-2}=10^{-4} \\ \mathrm{pH} & =-\log \left[\mathrm{H}^{+}\right]=-\log \left(1 \times 10^{-4}\right) \\ \mathrm{pH} & =4 \end{aligned}$$
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