Chemistry - Surface Chemistry Question with Solution | TestHub

According to Hardy Schulze rule, greater the valency of the coagulating ion, greater is its coagulating power. Thus, out of the given, ${\mathrm{AlCl}}_3\left({\mathrm{Al}}^{3+}\right)$ is most effective for causing coagulation of ${\mathrm{As}}_2{\mathrm{S}}_3$, sol.