2. Iron hydroxide sol was prepared by mixing equal volumes of 0.1 M ferric chloride solution and 0.02 M sodium hydroxide solution. Write the formula for the structure of the micelle of the resulting sol. Which of the electrolytes K3[Fe(CN)6], K4[Fe(CN)6] and MgSO4 will have greater coagulating ability for a given sol? Explain your conclusions.

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