L. V. Chernykh

Effect of the oxidation state of copper on the solution-solid phase equilibria in CuClx-MCl-H2O systems

The effect of the oxidation state of the metal on the solubility was analyzed using the example of CuClx-MCl-H2O (x = 1, 2; M = Li-Cs, NH4) ternary systems. The prevalence of acido complex formation is responsible for an essential similarity of the solubility isotherms: the presence of crystallization branches of complex salts and salting-in (or weak salting-out) of copper(I) and (II) chlorides, that increases in the order LiCl < NaCl < KCl < CsCl. The different stability of copper(I) and (II) chloride complexes results in that the chemical individuality of alkali metal cations is differently reflected in the shape of the solubility isotherms: The stronger complex formation in copper(I) systems results in leveling of this effect and the weaker complex formation with copper(II), in its differentiation.

Effect of Alkali Metal Chlorides on the Solubility in Ternary Water-Salt Systems Containing Copper Monochloride

Solubility in the systems of CuCl-LiCl-H2O and CuCl-CsCl-H2O at 25°C was studied by the method of isothermal removal of oversaturation. The results were examined in terms of the competition between hydration and complex formation processes in water-salt systems.

Comparative analysis of solubility in CuCl-MCl-H2O systems at 25°C (M+ = Li+, Cs+, NH 4 + )

Solubility in the ternary system CuCl-NH4Cl-H2O at 25°C was determined by the method of isothermal lifting of oversaturation. A comparative analysis of solubility in this system and the previously studied systems CuCl-MCl-H2O (M+ = Li+, Na+, K+, Cs+) was made. The results obtained were interpreted in terms of competition between hydration, association, and complexation processes in water-salt systems.

Solubility in the Ternary System Water-Cadmium Bromide-Copper(II) Bromide

Solubility in the system CuBr2-CdBr2-H2O at 25°C was determined by the method of isothermal saturation. The obtained data were examined from the viewpoint of competitive formation of acido complexes in aqueous solutions.