The molar conductivities `Lambda_(NaOAc)^@` and `Lambda_(HCI)^@` at infinite dilution is watter at `25^@C` are `91.0` and `426.2 S cm^@ //`mol respectively. To calculate `Lambda_(HOAc,)^2` the additional value required is:

Options

A. `^^ _("H_(2)O")^(@)`
B. `^^ _("KCl)^(@)`
C. `^^ _("NaOH")^(@)`
D. `^^ _("NaCl")^(@)`

Answer

D

Explanation

`lambda_(CH_(3)COONa)^(@)=lambda_(CH_(3)COO^(-))^(@)+lambda_(Na^(+))^(0)" "...(1)`
`lambda_(HCl)^(@)=lambda_(H^(+))^(@)+lambda_(Cl^(-))^(0)" "...(2)`
`lambda_(NaCl)^(@)=lambda_(Na)^(@)+lambda_(Cl^(-))^(0)" "...(3)`
`lambda_(CH_(3)COOH)^(@)=(1)+(2)-(3)`