34. Solution to Chemistry Problem

34. Solution to Chemistry Problem

3. Three flasks were filled with 50 ml of iron (III) hydroxide sol. To cause coagulation of the sol, it was necessary to add: 5.3 ml of 1 N potassium chloride solution to the 1st flask, 31.5 ml of 0.01 N sodium sulfate solution to the 2nd, and 18.7 ml of 0.001 N sodium phosphate solution to the 3rd. Calculate the coagulation thresholds of each electrolyte and indicate the sign of the particle charge. The coagulation thresholds are calculated as follows:

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