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According to the principles of simultaneous equilibrium and electronic charge neutrality, the thermodynamics of Zn(Ⅱ)-NaOH-H2O system was studied in this paper. Varying the concentration of sodium hydroxide, in range of 0-400 g/L, the distribution law of all zinc species and the mathematical model of equilibrium concentration of zinc in the system were obtained. The relative errors between theoretic calculation and the experimental values of total concentration of zinc were analyzed, and the absolute average error is only 0.129 8%. The mathematical model and the thermodynamic data are believable.
According to the principles of simultaneous equilibrium and electronic charge neutrality, the thermodynamics of Zn (II) -NaOH-H2O system was studied in this paper. Varying the concentration of sodium hydroxide, in range of 0-400 g / L, the distribution law of all zinc species and the mathematical model of equilibrium concentration of zinc in the system were obtained. The relative errors between theoretic calculation and the experimental values of total concentration of zinc were analyzed, and the absolute average error is only 0.129 8%. The mathematical model and the thermodynamic data are believable