For the rapid engineered coagulation of a positively charged ferric hydroxide () sol, which of the following analytical sequences strictly represents the correct decreasing order of coagulating power

Question

For the rapid engineered coagulation of a positively charged ferric hydroxide ($Fe(OH)_3$) sol, which of the following analytical sequences strictly represents the correct decreasing order of coagulating power of the given electrolytes according to the Hardy-Schulze formulation?

Prashant Kotian · Accepted Answer

Correct answer: A. For a positively charged sol, the active coagulating ions (flocculating ions) are the anions. The Hardy-Schulze rule dictates that higher valency strictly yields exponentially greater coagulating power. The correct descending valency order of the active anions is .

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