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Among the following electrolytes: Na2S...

Among the following electrolytes:
`Na_2SO_4 , CaCl_2 ,Al_2 (SO_4)_3 , ,NH_4 Cl`
which is the most effective coagulating agent for `Sb_2 S_3` solution?

Text Solution

Verified by Experts

The solution `Sb_2 S_3` is a negatively charged solution. Greater the valency of the flocculating ion, greater is the coagulation. This is known as Hardy-Schulze rule. For a negatively charged solution,
` Al^(3+) gt Ca^(2+) gt Na^(+) = NH_(4)^(+)`
Hence, the most effective coagulating agent for `Sb_2 S_3` solution is `Al_2( SO_4 )_3`
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