Surface ChemistryEasy
Question
Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 sol is
Options
A.Na2SO4
B.CaCl2
C.Al2(SO4)3
D.NH4Cl
Solution
As Sb2S3 is a negative sol, so, Al2(SO4)3 will be the most effective coagulant due to higher positive charge density on Al3+ in accordance with Hardy-Schulze rule.
Order of effectiveness of cations: Al3+ > Ca++ > Na+ > NH4+
Order of effectiveness of cations: Al3+ > Ca++ > Na+ > NH4+
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