The arsenious sulfide sol is negatively charg | vedclass

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(C) According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the active ion (the ion carrying a charge op

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$AlCl_3$

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(C) According to the Hardy-Schulze rule,the coagulating power of an electrolyte depends on the valency of the active ion (the ion carrying a charge opposite to that of the colloidal particles). Since the arsenious sulfide sol is negatively charged,the coagulating power depends on the valency of the cation. The higher the valency of the cation,the greater is its coagulating power. Comparing the cations: $Na^+$ (valency $1$) $Mg^{2+}$ (valency $2$) $Al^{3+}$ (valency $3$) Since $Al^{3+}$ has the highest valency,$AlCl_3$ will have the highest coagulating power.

The arsenious sulfide sol is negatively charged. Which of the following will have the highest coagulating power for its precipitation?

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