中文摘要：

用双平衡法研究Zn（Ⅱ）-NH3-Cl^--CO3^2-H2O体系中Zn（Ⅱ）配合平衡热力学，求出氨水浓度和氯离子浓度在0～10mol／L范围内变化时，体系中各物种的平衡浓度，绘制热力学平衡图，并对热力学计算结果进行实验验证和差异分析。结果表明：锌离子浓度理论计算值与实验值之间的平均相对误差为7．47％，这说明该热力学模型是正确的，所选数据的准确性较好。

英文摘要：

Thermodynamics of Zn（Ⅱ） complex equilibrium in the system of Zn（Ⅱ）-NH3-Cl^--CO3^2-H2O was studied by the double equilibrium method. Varying the concentration of ammonia and chloride ion, respectively, in range of 0-10 mol/L, the equilibrium concentrations of all the species in the system were calculated, and thermodynamic diagrams were plotted. The relative errors between theoretic calculation and the experimental values of total concentration of zinc were analyzed. The results show that the relative average error between the theoretic calculation and the experimental values is 7.47%. The critical data and the thermodynamic model are believable.