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The molar conductivities of KCI, NaCI an...

The molar conductivities of KCI, NaCI and `KNO_3` are 152, 128 and 111 `S cm^(2) mol^(-1)` respectively. What is the molar conductivity of `NaNO_3?`

A

0.1

B

0.02

C

0.15

D

0.03

Text Solution

Verified by Experts

The correct Answer is:
B
`^^_(CH_(3)COOH)^(@)=^^_(CH_(3)COONa)^(@)+^^_(HCl)^(@)-^^_(NaCl)^(@)`
`=90+425-125=390 mho cm^(2)"mol"^(-1)`
`a=(^^_(m)^(@))/(^^_(m)^(@))=(7.8)/(390)=0.02`
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