WBJEE · Chemistry · Ionic Equilibrium
The ratio of volumes of \(\mathrm{CH}_{3} \mathrm{COOH } \text{ 0.1}\) (N) to CH COONa 0.1 (N) required to prepare a buffer solution of \(\mathrm{pH} 5.74\) is (Given, \(p K_{a}\) of \(C H_{3} C O O H\) is \(\left.4.74\right)\)
- A \(10 : 1\)
- B \(5 : 1\)
- C \(1 : 5\)
- D \(1 : 10\)
Answer & Solution
Correct Answer
(D) \(1 : 10\)
Step-by-step Solution
Detailed explanation
Given, that \(\mathrm{pH}=5.74, \mathrm{pK}_{a}=4.74\) Suppose that volume of acid solution \(=x \mathrm{L}\) Volume of salt solution \(=y \mathrm{L}\) From Henderson equation, \[ \mathrm{pH}=\mathrm{p} K_{\mathrm{a}}+\log \frac{[\mathrm{Salt}]}{[\mathrm{Acid}]} \] or,…
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