7. For coagulation of 10.0 ml of Zn(OH)2 hydrosol, the following volumes of 0.1 M electrolyte solutions were required:_
Electrolyte NaCl Na2SO4 Na3PO4
V, ml 36 5 0.55
Calculate the coagulation thresholds, determine the sign of the charge of the colloidal particle. Write the formula of a micelle of the sol obtained by combining zinc chloride with sodium hydroxide.

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