Which one of the following acts as the best coagulating agen... | Chemistry | SolveeIt | Solveeit

Today, August 18

Question

Which one of the following acts as the best coagulating agent of ferric hydroxide sol ?

A

magnesium chloride

B

hydrochloric acid

C

aluminium chloride

D

potassium ferricyanide

Answer

potassium ferricyanide

Explanation

Solution

$Fe(OH)_{3}$ sol is positively charged. Hence, anion with the highest valency will be best coagulating agent, i.e., $[Fe(CN)_{6}]^{3-}$