Which of the following ions will be most effe | vedclass

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(A) The $As_2S_3$ sol is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an ion is directly proportional to the

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$Fe^{3+}$

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(A) The $As_2S_3$ sol is a negatively charged sol. According to the Hardy-Schulze rule,the coagulating power of an ion is directly proportional to the magnitude of its charge (valency) for ions carrying a charge opposite to that of the colloidal particles. Since $As_2S_3$ is negatively charged,it is coagulated by positively charged ions (cations). Among the given cations,$Fe^{3+}$ has the highest charge $(+3)$,followed by $Ba^{2+}$ $(+2)$. Therefore,$Fe^{3+}$ will be the most effective in coagulating the $As_2S_3$ sol.

Which of the following ions will be most effective in coagulating the $As_2S_3$ sol?

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