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A 100 mL 0.1 M solution of ammonium acet...

A 100 mL 0.1 M solution of ammonium acetate is diluted by adding 100 mL of water. The pH of the resulting solution will be (`PK_a` of acetic acid is nearly equal to p`K_a` of `NH_4 OH`)

A

`4.9`

B

`5.0`

C

`7.0`

D

`10.0`

Text Solution

Verified by Experts

The correct Answer is:
C
Hydrolysis of a salt of weak acid and weak and base :
`pH =7 +1/2 (pK_a -pK_b) =7`
`as pk_a ~~ pJK_b`
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