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The equivalent conductances of two stro...

The equivalent conductances of two strong electrolytes at infinite dilution in `H_(2)O` (where ions move freely through a solution) at `25^(@)C` are given below :
`Lambda_(CH_(3)COONa)^(@) = 91.0 S cm^(2)//"equi v"`.
`Lambda_(HCl)^(@) = 426.2 S cm^(2)//"equiv"`. What additional information//quantity one need to calculate `Lambda^(@)` of an aqueous solution of acetic acid ?

A

`Lambda^(@)` of chloroacetic (`ClCH_(2)COOH`)

B

`Lambda^(@)` of NaCl

C

`Lambda^(@)" of " CH_(3)COOK`

D

the limiting equivalent conductance of `H^(+)` ions.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `Lambda^(@)` of NaCl is needed.
`Lambda_(CH_(3)COOH)^(@)=Lambda_(CH_(3)COOH)^(@)+Lambda_(HCl)^(@)-Lambda_(NaCl)^(@)`
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