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Lambda(m)^(@) of NaCl, HCl and CH(3)COON...

`Lambda_(m)^(@)` of NaCl, HCl and `CH_(3)COONa` are 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
`Lambda_(m)^(@)(CH_(3)COOH)`
`=Lambda_(m)^(@)(CH_(3)COONa)+Lambda_(m)^(@)(HCl)-Lambda_(m)^(@)(NaCl)`
`=(91.0+425.9-126.4)=390.5" S.cm"^(2)."mol"^(-1)`
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