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The ionization constant of a weak electr...

The ionization constant of a weak electrolyte is `25 xx 10^(-6)` while the equivalent conductance of its `0.10M` solution is `19.6S cm^(2) eq^(-)`. The equivalent conductance of the electrolyte at infinite dilution (in `S cm^(2) eq^(-1))` will be

A

250

B

196

C

392

D

386

Text Solution

Verified by Experts

The correct Answer is:
C
`K_(a)=Calpha^(2)rArr25xx10^(-6)=10^(-2)xxalpha^(2)`
`alpha=5xx10^(-2)`
`alpha(lamda_(m))/(lamda_(m)^(oo))rArr5xx10^(-2)=(19.6)/(lamda_(m)^(oo))=(19.6xx100)/(8)=392`
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