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Degree of dissocation of CH(3)COOH and N...

Degree of dissocation of `CH_(3)COOH` and `NH_(4)OH` are the same. If `0.1 M` solution of `CH_(3)COOH` has `pH = 4.0`, them `pH ` of `0.01 M NH_(4)OH` will be

A

4

B

7

C

10

D

14

Text Solution

Verified by Experts

The correct Answer is:
C
`pH=4,[H^(+)]=10^(-4)`
`[H^(+)]=sqrt(kac)`
`10^(-4)=sqrt(kaxx10^(-2))`
`ka=10^(-6)`
`ka=kb=10^(-6)`
`[OH^(-)]=sqrt(kbxxc)=sqrt(10^(-6)xx10^(-2))=10^(-4)`
pOH=4
`pH=14-4=10`
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