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

Question:

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

 

  1. $\mathrm{AlCl}_{3}$

  2. $\mathrm{NaCl}$

  3. $\mathrm{BaCl}_{2}$

  4. $\mathrm{Na}_{3} \mathrm{PO}_{4}$


Correct Option: 1

Solution:

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

$\mathrm{Al}^{3+}>\mathrm{Ba}^{2+}>\mathrm{Na}^{+}$coagulating power.

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