The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2S3 are given below:
I. (NaCl) = 52, II. (BaCl2) = 0.69 III. (MgSO4) = 0.22
The correct order of their coagulating power is
$Coagulation \ power \propto \dfrac{1}{Coagulation \ value}$
Higher the coagulation power, lower is the coagulation values in millimoles per litre.
MgSO4 > BaCl2 > NaCl.
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