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The pH of a buffer solution of 0.1 M NH(...

The pH of a buffer solution of 0.1 M `NH_(4)OH [ pK_(a)=4.0]` and `0.1 M NH_(4)Cl` is

A

`9.26`

B

`9.17`

C

`4.74`

D

`4.65`

Text Solution

Verified by Experts

The correct Answer is:
B
Due to addition of 0.01 mole oc HCl
`NH_(4)OH+HCl to NH_(4)Cl+H_(2)O`
`[NH_(4)OH]=0.1-0.01`
`[NH_(4)Cl)=0.1+0.01`
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