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Grade 11Inorganic Chemistry

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

Profile image of Radhika Batra
12 Years agoGrade 11
Answers icon

1 Answer

Profile image of Jitender Pal
12 Years ago
(C) 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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