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Chemistry · PYQ NEET UG 2022
हिन्दीThe pH of the solution containing \( 50\text{ mL} \) each of \( 0.10\text{ M} \) sodium acetate and \( 0.01\text{ M} \) acetic acid is _______. [Given \( \text{p}K_a \) of \( \text{CH}_3\text{COOH} = 4.57 \)]
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Correct answer · Option C
\( 5.57 \)
Explanation
Using Henderson-Hasselbalch equation: \( \text{pH} = \text{p}K_a + \log(\frac{[\text{Salt}]}{[\text{Acid}]}) = 4.57 + \log(\frac{0.10}{0.01}) = 4.57 + 1 = 5.57 \).
