140. Solving a chemistry problem
The coagulation threshold of metallic gold hydrosol caused by NaCl is 24 mmol / L, and K2SO4 is 11 mmol / L. Using the Schulze-Hardy and Deryagin-Landau rules, determine the sign of the sol charge and calculate the coagulation threshold for the following electrolytes: CaCl2, MgSO4, Al2 (SO4) 3, AlCl3, Th (NO3) 4.
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