Molar conductivities (Lambda(m)^(@)) at ...

Molar conductivities `(Lambda_(m)^(@))` at infinite dilution of `NaCl, HCl` and `CH_(3)COONa` arc `126.4, 425.9` and `91.0 S cm^(2) mol^(-1)` respectively. `Lambda_(m)^(@)` for `CH_(3)COOH` will be

A

`"180.5 S cm"^(2)" mol"^(-1)`

B

`"290.8 S cm"^(2)" mol"^(-1)`

C

`"390.5 S cm"^(2)" mol"^(-1)`

D

`"425.5 S cm"^(2)" mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:

C

`CH_(3)COOHNa+HClrarr NaCl+CH_(3)COOH`
`91+425.9=126.4+x`
`therefore" "x=390.5" ohm"^(-1)"cm"^(2)"mol"^(-1)`

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