Chemistry - Electrochemistry Question with Solution | TestHub

The conductivity of a weak acid HA of concentration $0.001\mathrm{mol}{\mathrm{L}}^{-1}$ is $2.0\times 10^{-5}\mathrm{S}{\mathrm{cm}}^{-1}$.
If ${\Lambda }_{\mathrm{m}}^{\circ }(\mathrm{HA})=190\mathrm{S}{\mathrm{cm}}^2{\mathrm{mol}}^{-1}$, the ionization constant $\left({\mathrm{K}}_{\mathrm{a}}\right)$ of $\mathrm{HA}$ is equal to _______ x $10^{-6}$.