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  • The ion that is more effective for coagulation of  sol is:Option: 1 <img alt="B

The ion that is more effective for coagulation of As_{2}S_{3} sol is:

Option: 1

Ba^{2+}


Option: 2

Al^{3+}


Option: 3

Na^{+}


Option: 4

PO_4^{3-}


Answers (1)

best_answer

Hardy Schulze Rule -

According to it, "Higher the valency of the active electrolyte ion, the more is its power to precipitate the sol."

  • The coagulation power of cations for negatively charged colloids is:
    Si+4 > Al3+ > Mg2+ > Na+
  • The coagulation power of anion for positively charged sol is:
    [Fe(CN)6]4- > PO43- > SO42- > Cl-.

 

As_{2}S_{3} is negatively charged sol. Hence, Al^{3+} is the most effective coagulating agent as the higher is the magnitude of positive charge, the higher is the coagulating power.

Therefore, the option number (2) is correct.

Posted by

Rishabh

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