A saturated solution of sparingly soluble base $\mathrm{Fe}{\left(\mathrm{OH}\right)}_3$ is found to have a specific conductance of $50\times {10}^{-4}{\mathrm{ohm}}^{-1}{\mathrm{m}}^{-1}$.
Given ${\mathrm{\lambda }}_{\mathrm{eq}}^{\mathrm{\infty }}{\mathrm{FeCl}}_3=10\times {10}^{-3}{\mathrm{Sm}}^2{\mathrm{eq}}^{-1}$
${\mathrm{\lambda }}_{\mathrm{eq}}^{\mathrm{\infty }}\mathrm{NaCl}=16\times {10}^{-3}{\mathrm{Sm}}^2{\mathrm{eq}}^{-1}$
${\mathrm{\lambda }}_{\mathrm{eq}}^{\mathrm{\infty }}\mathrm{NaOH}=23\times {10}^{-3}{\mathrm{Sm}}^2{\mathrm{eq}}^{-1},$specific conductance of water is negligible, Then