8. Copper ferricyanide hydrosol Cu2[Fe(CN)6] is obtained by the double exchange reaction between CuCl2 and K4[Fe(CN)6]:
2CuCl2 K4[Fe(CN)6]= Cu2[Fe(CN)6 4KCl
What are the concentrations of the electrolytes if 10.0 ml of the sol coagulates when the following volumes of electrolyte solutions with the coagulation threshold specified in the table are added to it:
Electrolyte KNO3 Ca(NO3)2 Al(NO3)3
V, ml 25.0 11.0 10.0
y, mol/l 7.5 0.11 0.01
Determine the sign of the charge of the colloidal particle. Write the formula of the sol micelle.

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