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# Which one of the following is most effective in causing the coagulation of an $As_2S_3$ sol?

$\begin {array} {1 1} (1)\;KCl & \quad (2)\;AlCl_3 \\ (3)\;MgSO_4 & \quad (4)\;K_3Fe(CN)_6 \end {array}$
Can you answer this question?

$(2) AlCl_3$
answered Nov 7, 2013 by