The pH values of the solutions of the ternary system H2O–HCl–AlCl3·6H2O were determined. The ionization constants of the complexes were calculated. Empirical dependences are obtained, allowing to calculate the ionization constant of solutions of various concentrations.
cationic aquacomplex, anionic hydroxocomplex, hydrolysis, ionization constant, pH of solutions of the ternary system H2O–HCl–AlCl3·6H2O.