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For coagulation of arsenious sulphide sol , which one of the following salt solution will be most effective ?

  • Option 1)

    BaCl_{2}

     

  • Option 2)

    Na _{3}PO_{4}

  • Option 3)

    AlCl_{3}

  • Option 4)

    NaCl

Answers (2)

best_answer

 

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)

 


Option 1)

BaCl_{2}

 

Option 2)

Na _{3}PO_{4}

Option 3)

AlCl_{3}

Option 4)

NaCl

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