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Molar conductiveiy [Lambda m] at infinit...

Molar conductiveiy `[Lambda _m]` at infinite dilution of Na CL, HCl and `CH_3 COONa` are `126.4, 425, 9` and `91 0 S cm^2 "mol"^(-1)` respectively, `Lambda_m` for `CH_3COOH` will be ,

A

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

B

` 180 .5 S cm^2 "mol"^(-1)`

C

` 290 ,8 S cm^2 "mol"^(-1)`

D

` 390. 5 cm^2 "mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Lambda_m^@ (CH_3 COOH) + Lambda_m^@ (CH_3 COONa) + Lambda_m^@ (HCl)`
` - Lambda_m^@ (NACl)`
`= 91 . 0 + 425. 9 - 126 . 4`
`= 516 .9 - 126 .4`
`= 390 . 5 S cm^2 "mol"^(-1)` .
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