57. Solution to Chemistry Problem

5. The coagulation threshold of a positively charged iron hydroxide hydrosol under the action of sodium chloride is 9.25 mmol/l. Using the Schulze-Hardy rule and the Deryagin-Landau series, calculate the coagulation thresholds for this sol caused by the following electrolytes: potassium nitrate, barium chloride, potassium sulfate, magnesium sulfate, potassium dichromate, and potassium phosphate.