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Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 sol is (A) Na2SO4 (B) CaCl2 (C) Al2(SO4)3 (D) NH4Cl

Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 sol is
(A) Na2SO4
(B) CaCl2
(C) Al2(SO4)3
(D) NH4Cl 

Grade:12th pass

1 Answers

grenade
2061 Points
8 years ago
©
As Sb2S3 is a negative sol, so, Al2(SO4)3 will be the most effective coagulant due to higher charge density on Al3+ in accordance with Hardy-Schulze rule. Order of effectiveness of cations: Al3+ > Ca++ > Na+ > NH4 +

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