The molar conductivities at infinite dilution for sodium acetate, _hydrochloric acid and sodium cholride are 92.5,426.9 and 120.4 `S cm^2mol^(-1)` respectively at 298 K. Calculate the molar conductivity of acetic acid at infinite dilution.

Explanation

`lambda^@(CH_3COOH) = lambda_H^@ + lambda_(CH_3CO^(-))^@`
`rArr lambda_(CH_3CO^(-))^@ + lambda_(Na)^@ + lambda_(H^(+))^@ + lambda_(Cl^(-))^@ - lambda_(Na^(+))^@ - lambda_(Cl^(-))^@`
`lambda^@(CH_3COOH) = lambda^@ (CH_3 COONa) + lambda^@ (HCl) - lambda^@ (NaCl)`
`lambda(CH_3COONa) = 91.0s cm^2 mol^(-1)`
`lambda^@ (NaCl) = 126.4 s cm^2 mol^(-1)`
`:. lambda^@(CH_3COOH) = 91.0 + 425.9 - 126.4`
` = 390.5 s cm^2 mol^(-1)`