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根据质量平衡和电荷平衡的双平衡法,研究Ni(Ⅱ)-NH3-Cl--H2O体系中Ni(Ⅱ)配合平衡热力学;求出氨水浓度和氯离子浓度在0～5 mol/L范围内变化时,体系的pH值、体系中总镍、游离氯离子、游离氨以及各种镍-氨配合物等的平衡浓度,绘制热力学平衡图,并对热力学计算结果进行试验验证和差异分析。研究结果表明:镍离子浓度理论计算值与试验值之间的相对误差绝对平均值为6.91%,这说明该热力学模型是正确的,所选数据的准确性较好。
The equilibrium thermodynamics of Ni (Ⅱ) complex in Ni (Ⅱ) -NH3-Cl - H2O system was studied according to the double equilibrium method of mass balance and charge balance. The ammonia concentration and the chloride ion concentration in the range of 0 ~ 5 mol / L At the time of the change, the equilibrium concentration of total nickel, free chlorine, free ammonia and various nickel-ammonia complexes in the system is plotted, and the thermodynamic equilibrium diagram is drawn. The thermodynamic calculation results are verified and analyzed by difference. The results show that the absolute mean relative error between the theoretical calculated value of nickel ion and the experimental value is 6.91%, which shows that the thermodynamic model is correct and the accuracy of the selected data is good.