Study of (m1LiX+m2CaX2)(aq) wheremidenotes molality andXdenotes Cl, or Br at the temperature 298.15 K

Thermodynamic study of aqueous sodium and potassium chloride and chromate systems at the temperature 298.15 K

“…(9,10,18) The simulation has been performed as follows: determination of the Pitzer binary parameters β (0) , β (1) , and C φ taking into account the ionic interactions of two ions and three ions; determination of the Pitzer ternary parameters {θ(MN) and (MNX)} characterizing the interaction between two different ions of the same sign (MN) and the interaction between three ions (MNX, MMX and NNX), respectively; and calculation of the solubility isotherms of the three-component solutions. The same scheme has been used to simulate other ternary (11,12,19) and multicomponent solutions (9,10) from which phases with a constant stoichiometric composition (simple or double salts) crystallize.…”

Thermodynamic study of (m1Cs2SeO4+m2NiSeO4)(aq)wheremdenotes molality atT= 298.15 K

“…(15) It has been shown that Pitzer equations can describe the properties of binary (1,2,4,13) and multicomponent (16,17) solutions in which phases with a constant composition (simple and double salts) (16)(17)(18)(19)(20) and solid solutions (3,5) crystallize.…”

“…The applicability of this approach has been shown for a series of other ternary and multicomponent aqueous solutions. (16)(17)(18)(19)(20) BINARY SUBSYSTEMS A thermodynamic analysis of Cs 2 SeO 4 (aq) has been performed on the basis of the data obtained in the present study on the concentration dependence of the osmotic coefficient (table 1). The binary parameters of the interionic interaction for NiSeO 4 (aq) are taken from the literature.…”

“…A method described in previous papers has been used. (2,16,20) The calculated solubility isotherm is presented in figure 1. The results of the calculation agree very well with the experimental results.…”

“…In addition, the lnK o sp value for the double salt Cs 2 SeO 4 · NiSeO 4 · 6H 2 O, crystallizing in the ternary solutions has to be constant along the whole crystallization branch of the double salts. (10,17,20) In our calculations of the ternary parameters we have included unsymmetrical mixing terms E θ and E θ , according to reference 14. In a previous study of one of the authors, the solutions (m 1 CsC1 + m 2 NiC1 2 )(aq) and (m 1 CsBr + m 2 NiBr 2 )(aq) were simulated and the value θ(Cs, Ni) = −0.230 was proposed.…”