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What is the K(b) of weak base that produ...

What is the `K_(b)` of weak base that produce one OH-ion if a 0.05 M solution is 2.5% ionised ?

A

`7.8xx10^(-8)`

B

`1.6xx10^(-6)`

C

`3.1xx10^(-5)`

D

`1.2xx10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
C
One `OH^(-)` molecule means monoacidis base.
Like `NH_(4)` OHorBOH
`BOH hArr B^(+)rArrKb`
`K_(b)=0.05xx((2.5)/(100))^(2)rArr3.1xx10^(-5)`
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