Equilibrium Question 504

Question: The $ pK_{a} $ of equimolecular sodium acetate and acetic acid mixture is 4.74. If $ pH $ is [DPMT 2001]

Options:

A) 7

B) 9.2

C) 4.74

D) 14

Show Answer

Answer:

Correct Answer: C

Solution:

$ pH=pK_{a}+log\frac{[\text{ Salt }]}{[\text{ Acid }]} $ equimolar means $ \frac{[\text{ Salt }]}{[\text{ Acid }]}=1 $ ;

$ pH=4.74+0=4.74 $



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