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If the pK(a) of acetic acid and pK(a) of...

If the `pK_(a)` of acetic acid and `pK_(a)` of dimethyalmanie are 4.76 and 3.26 respectively, the pH of dimethyl ammonium acetate solution is

A

7.75

B

6.75

C

`7.0`

D

8.5

Text Solution

Verified by Experts

The correct Answer is:
A
`pH=7+(1)/(2) [pK_(a) -pK_(b)]`
Here, `pK_(a) =4.76, pK_(b) =3.26`
`=7+(1)/(2) [4.76-3.26]`
`=7+(1)/(2)[1.50]`
`=7+0.75=7.75`
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