At infinite dilution in the aqueous solution of `BacI_2`, molar conductivity of `Ba^(2+)` and `Cl^(-)` ions are 127.32 S `cm^(2)` /mol and 76.34 S `cm^(2)` /mol, respectively. What is the molar conductivity for `BaCl_(2)` at same dilution?

Options

A. 280 S `cm^(2)` `mol^(-1)`
B. 330.98 S `cm^(2)` `mol^(-1)`
C. 90.98 S `cm^(2)` `mol^(-1)`
D. 203.6 S `cm^(2)` `mol^(-1)`

Answer

A

Explanation

`Lambda_(mBaCI_2)^@=lambda_(Ba^(2+))^@+2lambda_(CI^(-))^@`
=127.32+2(76.34)=280 S `cm^2 mol^(-1)`