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 $
