JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)
In order to prepare a buffer solution of \(pH\, 5.74\) sodium acetate is added to acetic acid. If the concentration of acetic acid in the buffer is \(1.0\) \(M\), the concentration of sodium acetate in the buffer is ......... \(M\). (Round off to the Nearest Integer). [Given : \(pKa\) (acetic acid) \(=4.74\) ]
- A \(5\)
- B \(15\)
- C \(20\)
- D \(10\)
Answer & Solution
Correct Answer
(D) \(10\)
Step-by-step Solution
Detailed explanation
\(pH = pKa +\log \frac{[ CB ]}{[ WA ]}\) \(5.74=4.74+\log \frac{[ CB ]}{1}\) \(\Rightarrow[ CB ]=10 M\)
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