Question

Which of the following will have the highest coagulation power for ${As}_2{S}_3$ collide?

• A. ${PO}_4^{3-}$
• B. ${SO}_4^{2-}$
• C. ${Al}^{3+}$
• D. ${Na}^{+}$

Answer 1

Answer: (C)

${Al}^{3+}$

$A{l}^{3+}$ has the highest coagulating power because the given $A{s}_2{S}_3$ sol solution is a negatively charged sol which can be coagulated easily by more positively charged species.

Hence option C is correct.