According to Hardy-Schulze rule, what is the precise decreasing order of coagulating power of the gi — Surface Chemistry Chemistry Question

💡 Solution & Explanation

For a positively charged sol, the active flocculating ions are the anions. The Hardy-Schulze rule states coagulating power sharply increases with valency. The valency order of anions is $[Fe(CN)_6]^{4-} > PO_4^{3-} > SO_4^{2-} > Cl^-$.