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The molar conductance of NaCl, HCl and C...

The molar conductance of NaCl, HCl and `CH_(3)COONa` at infinite dilution are 126.45, 426.16 and 91 `ohm^(-1) cm^(2) mol^(-1)` respectively. The molar conductance of `CH_(3)COOH` at infinite dilution is :

A

`201. 28 ohm^(-1) cm^(2)`

B

`390 . 71 ohm ^(-1) cm^(2)`

C

`698.28 ohm^(-1) cm^(2)`

D

`540 ohm^(-1) cm^(2)`.

Text Solution

Verified by Experts

The correct Answer is:
B
`Lambda_(C_(2) H_(5) COOH)^(@) = Lambda_(C_(2) H_(5) COONa)^(@) + Lambda_(HCl)^(@) - Lambda_(NaCl)^(@)`
`= 91 + 426.16 - 126. 45`
`= 390. 71 ohm^(-1) cm^(2)` .
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