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question mark

For coagulation of arsenious sulphide sol,
which one of the following salt solution will be
most effective ?
(1) AlCl3 (2) NaCl
(3) BaCl2 (4) Na3PO4

veed vardhana , 6 Years ago
Grade 11
anser 2 Answers
Mayank
Sulphide is -ve charged colloid so cation with maximum charge will be most effective for coagulation.
Al3+ > Ba2+ > Na+ ------->order for  coagulating power , so the ans. is option 1
ApprovedApproved
Last Activity: 6 Years ago
Arun

Formation of dinitrogen trioxide by arsenious oxide -

By the action of 50% HNO3 on the arsenious oxide

- wherein

2HNO_{3}+As_{2}O_{3}+2H_{2}O\rightarrow NO+NO_{2}+2H_{3}AsO_{4}

NO\overset{250K}{\rightarrow}N_{2}O_{3}

Sulphide is -ve charged colloid so cation with maximum charge will be most effective for coagulation

Al^{3+}>Ba^{2+}>Na^{+}(Coagulating \; Power)

 

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Last Activity: 6 Years ago
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