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The equivalent conductance of two strong...

The equivalent conductance of two strong electrolytes at infinite dilution in `H_(2)O` (where ions move freely through a solution) at `25^(@)C` are given below:
`A_(CH_(3)COONa)^(@)=91.0S cm^(2)//"equiv"`
`A_(HCl)^(@)=426.25cm^(2)//"equiv"`
What additional information/quantity one needs to calculate `A^(@)` of an aqueous solution of acetic acid?

A

The limiting equivalent conductance of `H^(+)(lamda^(@)H^(+))`

B

`(^^)^(@)` of chloroacetic acdi `(CICH_(2)COOH)`

C

`(^^)^(@)` of NaCl

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
According to Kohlrausch's law the molar conductivity at infinity diluation `(^^)^(@)` for weak electrolyte `CH_(3)COOH` is
`(^^)_(CH_(3)COOH)^(@)=(^^)_(CH_(3)+COONa)^(@)+(^^)_(HCl)^(@)-(^^)_(NaCl)^(@)`
So for calculating the value of `(^^)_(CH_(3)COOH)^(@)` value of `^^_(CaCl)^(@)` should also be known.
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