Which of the following expressions correctly represents the equivalent conductance at infinite dilution of `Al_(SO_(4_(3))`. Given that `overset(@)Lambda_(Al^(3+))` and `overset(@)Lambda_(SO_(4)^(2-))` are the equivalent conduactance at infinite dilution of the respective ions?

Options

A. `2 Lamda_(Al^(3+))^(0) + 3Lamda_(SO_(4)^(2-)^(0)`
B. `Lamda_(Al^(3+))^(0) + Lamda_(SO_(4)^(2-))^(0)`
C. `(lamda_(Al^(3+))^(0) + Lamda_(SO_(4)^(2-))^(0)) xx 6`
D. `(1^(Lamda^(@)))/(3) Al^(3+)+ (1^(Lamda^(@)))/(2) SO_(4)^(2-)`

Answer

B

Explanation

At infinite dilution, when dissociation is complete, each ion makes a definite contribution towards molar conductance of the electrolyte irrespective of the nature of the other ion with which it is associated. Hence, `lamda_(Al_(2)(SO_(4))_(3))^(@)= lamda_(Al^(3+))^(@)+ lamda_(SO_(4)^(2-))^(@)`