As_2S_3 sol has a negative charge. Capacity t | vedclass

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(A) According to the Hardy-Schulze rule,the coagulating power of an ion is directly proportional to its valency for the coagulation of a sol.Since $As

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$AlCl_3$

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(A) According to the Hardy-Schulze rule,the coagulating power of an ion is directly proportional to its valency for the coagulation of a sol.Since $As_2S_3$ sol is negatively charged,it is coagulated by the addition of positive ions (cations).The coagulating power of cations follows the order: $Al^{3+} > Ca^{2+} > Na^+$.Therefore,$AlCl_3$ (which provides $Al^{3+}$ ions) has the highest capacity to precipitate $As_2S_3$ sol.

$As_2S_3$ sol has a negative charge. Capacity to precipitate it is highest in

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