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Grade: 12th pass
        
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 
4 years ago

Answers : (1)

grenade
2061 Points
							
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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 +
4 years ago
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