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The equivalent conductance of M//32 solu...

The equivalent conductance of `M//32` solution of a weak monobasic acid is `8.0 ` and at infinite dilution is `400 `. The dissociation constant of this acid is :

A

`1. 25xx10^(-4)`

B

`1.25xx10^(-5)`

C

`1.25xx10^(-6)`

D

`6.25xx10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
B
` alpha=(80)/(400)=0.02`
`K=Calpha^(2)=(1)/(32)xx(0.02)^(2)`
`K=0.03125xx(0.02)^(2)=1.25xx 10^(-5)`
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