As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol — Surface Chemistry Chemistry Question
Question
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order: 8 3 6 2 4 3 3 6 2 4 3 3 3 6 2 4 3 3 3 6 3 2 4 3 3 (A) AlCl > K [Fe(CN) ] > K CrO > KBr = KNO (B) K [Fe(CN) ] < K CrO < AlCl < KBr < KNO (C) K [Fe(CN) ] < K CrO < KBr = KNO = AlCl (D) K [Fe(CN) ] > AlCl > K CrO > KBr > KNO
💡 Solution & Explanation
The minimum concentration of an electrolyte which is required to cause the coagulation or flocculation of a sol is known as flocculation value. Flocculation value is inversely proportional to coagulation power (coagulation power is directly proportional to the valency of the ions causing coagulation). Fe(OH) sol is a positive sol and thus we have to consider the valency of the anions in the given electrolytes.