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Calculate pH of a solution of given mixt...

Calculate `pH` of a solution of given mixture (`0.1 "mol e" CH_(3)COOH+0.2 mole CH_(3)COONa`) in `100 ml` of mixture. `K=2xx10^(-5)`.

A

5

B

5.6

C

6.6

D

7.6

Text Solution

Verified by Experts

The correct Answer is:
A
We have `pH =-log K_(a)+log (["Salt"])/(["Acid"])`
`=-log 2 xx 10^(-5) +log ((0.2 xx 1000)/(100))/((0.1 xx 1000)/(100))`
=4.7+0.3=5
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