Which of the following is most effective in causing the coagulation of ferric hydroxide sol? — Surface Chemistry Chemistry Question
Question
Which of the following is most effective in causing the coagulation of ferric hydroxide sol?
Answer: D
💡 Solution & Explanation
Fe(OH)3 is a positively charged sol. Negatively charged anions cause coagulation. By Hardy-Schulze, coagulating power: Cl^- < SO4^2- < [Fe(CN)6]^3-. The trivalent anion from K3Fe(CN)6 is most effective.
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