19. Cadmium hydroxide sol was obtained by combining solutions of CdCl2 and NaOH. Determine the sign of the charge of the colloidal particle, write the formula of the micelle if the electrolyte coagulation thresholds are as follows:
Electrolyte Na2SO4 Mg(NO3)2 Na3PO4 NaCl
y, mol/l 0.011 0.70 0.001 0.70
Calculate the volumes of 0.01 M electrolyte solutions that caused coagulation of 10.0 ml of sol.

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