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pH of a solution of 10 ml. 1 N sodium ac...

`pH` of a solution of `10 ml`. `1 N` sodium acetate and `50 ml 2N` acetic acid `(K_(a)=1.8xx10^(-5))` is approximately

A

4

B

5

C

6

D

7

Text Solution

Verified by Experts

The correct Answer is:
A
`pH = pK_(a) + log.(["Salt"])/(["Acid"])`
`pH = - log (1.8 xx 10^(-5)) + log.([10])/([100])`
`= -log 1.8 + 5 + log 10^(-1)`
`= 0.2553 + 5 - 1 = 3.7447` or = 4.
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