(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；2. 江西理工大學(xué) 材料與化學(xué)工程學(xué)院，贛州 341000)
摘 要: 用雙平衡法研究Zn(Ⅱ)-NH3-Cl−-CO32−-H2O體系中Zn(Ⅱ)配合平衡熱力學(xué)，求出氨水濃度和氯離子濃度在0～10 mol/L范圍內(nèi)變化時(shí)，體系中各物種的平衡濃度，繪制熱力學(xué)平衡圖，并對(duì)熱力學(xué)計(jì)算結(jié)果進(jìn)行實(shí)驗(yàn)驗(yàn)證和差異分析。結(jié)果表明：鋅離子濃度理論計(jì)算值與實(shí)驗(yàn)值之間的平均相對(duì)誤差為7.47%，這說(shuō)明該熱力學(xué)模型是正確的，所選數(shù)據(jù)的準(zhǔn)確性較好。
關(guān)鍵字: 熱力學(xué)；Zn(Ⅱ)配合平衡；雙平衡法
ZHAGN Wen-hai1, TANG Chao-bo1, HE Jing1
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Faculty of Materials and Chemical Engineering, Jiangxi University of Science and Technology,
Ganzhou 341000, China）
Abstract:Thermodynamics of Zn(Ⅱ) complex equilibrium in the system of Zn(Ⅱ)-NH3-Cl−-CO32−-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.
Key words: Thermodynamics; Zn (Ⅱ) complex equilibrium; double equilibrium method
