11. The coagulation threshold of a negatively charged arsenic sulfate hydrosol under the action of potassium chloride is 49 mmol/l. Using the Schulze-Hardy rule and the Deryagin-Landau series, calculate for this sol the thresholds of coagulation caused by electrolytes: potassium nitrate, potassium sulfate, magnesium chloride, magnesium sulfate, aluminum chloride, aluminum sulfate?

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