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Equivalent conductivity at infinite dilu...

Equivalent conductivity at infinite dilution for sodium - potasium oxalate `[(COO^(-))_(2)Na^(+)K^(+)]` will be [given, molar conductivity of oxalate, `K^(+)` and `Na^(+)` ions at infinite dilution are `148.2, 50.1, "73.5 S.cm"^(2)."mol"^(-1)` respectively]-

A

`"271.8 S.cm"^(2)"eq"^(-1)`

B

`"67.95 S.cm"^(2)"eq"^(-1)`

C

`"543.6 S.cm"^(2)"eq"^(-1)`

D

`"135.9 S.cm"^(2)"eq"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Lambda_(m)^(0)=Lambda_(m)^(0)" (oxalate)"+Lambda_(m)^(0)(K^(+))+Lambda_(m)^(0)+Lambda_(m)^(0)(Na^(+))`
`=148.2+50.1+73.5="271.8S. Cm"^(2)."mol"^(-1)`
`therefore Lambda^(0)=(Lambda_(m)^(0))/(2)=(271.8)/(2)="135.9S. Cm"^(2)."mol"^(-1)`
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