According to Kohlrausch’s law, the equivalent conductance of BaCl₂ at infinite dilution,

$\lambda$_$\infty$ of BaCl₂ = {1 \over 2}$$\lambda _$\infty$ of Ba²⁺ + $\lambda$_$\infty$ of Cl^-

$\Rightarrow$ $\lambda$_$\infty$ of BaCl₂ = ${1 \over 2} \times 127 + 76$ = 139 5