`lambda_(m)^(@)` for `NaCl, HCl and CH_(3)COONa` are 126.4,425.9 and `"91.0 S cm"^(2)//"mol"` respectively. Calculate `lambda_(m)^(@)" for "CH_(3)COOH`.

Explanation

Eq.1, `wedge_(CH_(3)COONa)^(0) to lambda_(CH_(3)COO^(-))^(0)+lambda_(Na^(+))^(0) 91"ohm"^(-1)cm^(2)mol^(-1)`
Eq. 2, `wedge_(HCl)^(0) to lambda_(HCl)^(0)+lambda_(H^(+))^(0)+lambda_(Cl^(-))^(0)426"ohm"^(-1) cm^(2) mol^(-1)`
Eq. 3, `wedge_(NaCl)^(0) to lambda_(Na^(+))^(0)+lambda_(Cl^(-))^(0)126"ohm"^(-1) cm^(2) mol^(-1)`
Equation (1)+ Equation (2)- Equation (3)
`wedge_(CH_(3)COOH)^(0) to lambda_(CH_(3)COO^(-))^(0)+lambda_(H^(+))^(0) 91+426.15-126.45=390.7S cm^(2)mol^(-1)`