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NaCl- $CaCl_2$ - $H_2O$  KCl- $CaCl_2$ - $H_2O$    () $50^{\circ}C$  ,           .      ,   , NaCl ( KCl)  $CaCl_2{\cdot}2H_2O$        .      ${\theta}_{M,Ca}$  ${\Psi}_{M,Ca,Cl}$ (M = Na or K),  $K_{sp}$    , , NaCl, KCl  $CaCl_2$  - Pitzer  ${\beta}^{(0)}$ , ${\beta}^{(1)}$ , ${\beta}^{(2)}$ and $C^{\Phi}$     .     . 【The solubility and the physicochemical property (refractive index) in the NaCl- $CaCl_2$ - $H_2O$ and KCl- $CaCl_2$ - $H_2O$ systems were determined at $50^{\circ}C$ and the phase diagrams and the diagrams of physicochemical property vs composition were plotted. One invariant point, two univariant curves, and two crystallization zones, corresponding to sodium Chloride (or potassium chloride), dihydrate ( $CaCl_2{\cdot}2H_2O$ ) showed up in the phase diagrams of the ternary systems. The mixing parameters ${\theta}_{M,Ca}$ and ${\Psi}_{M,Ca,Cl}$ (M = Na or K) and equilibrium constant $K_{sp}$ were evaluated in NaCl- $CaCl_2-H_2O$ and KCl- $CaCl_2-H_2O$ systems by least-squares optimization procedure, in which the single-salt Pitzer parameters of NaCl, KCl and $CaCl_2$ ${\beta}^{(0)}$ , ${\beta}^{(1)}$ , ${\beta}^{(2)}$ and $C^{\Phi}$ were directly calculated from the literature. The results obtained were in good agreement with the experimental data.】

Measurement of Solubilities in the Ternary System NaCl + CaCl2+ H2O and KCl + CaCl2+ H2O at 50℃

Measurement of Solubilities in the Ternary System NaCl + CaCl₂+ H₂O and KCl + CaCl₂+ H₂O at 50℃