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The pH of a solution at 25^(@)C containi...

The `pH` of a solution at `25^(@)C` containing `0.10 M` sodium acetate and `0.03 M` acetic acid is (`pK_(a)` for `CH_(3)COOH=4.57`)

A

4.09

B

6.09

C

5.09

D

7.09

Text Solution

Verified by Experts

The correct Answer is:
C
According to Henderson's equation , `pH=pk_(a)+log""("[salt]")/("[acid]")`
`CH_(3)COOH+NaOH to CH_(3)COONa+H_(2)O`
Putting the values, we get :
pH =4.57 + `log""(0.10)/(0.03)`
`implies pH=5.09`
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