(河北师范大学化学系, 石家庄 050016河北经贸管理干部学院, 石家庄 050000
河北联合制药厂, 石家庄 050000
)
摘 要: 对《亚稳态物质φ-pH图》一文中的若干问题做出了进一步阐明: (1) 水中固态物(s)的浓度值是由于利用热力学函数ΔGf,i统一讨论同系物多化学反应时的一种自然结果, 并不违背化学中对固体物浓度的规定; 在当它为非稳定物种时给出一个小于1的浓度数值。 (2) 绘制水溶物(aq)任意质量摩尔浓度条件下的φ-pH图时, 需对水溶物(aq)的DMi函数式再附加一个质量摩尔浓度(m ≠1)项。 此外, 对于用同系物的稳定结构式演绎所得多种情况下的φ-pH图和相关热力学数据的功能特点也作了深入分析。
关键字: Pourbaix图 亚稳态物的φ-pH图 热力学相对稳定性指数DMi
φ-pH DIAGRAM FOR M-H2O SYSTEM
(1 Hebei Normal University, Shijiazhuang 050016, P. R. China2 Hebei Economy & Trade Managing College, Shijiazhuang 050000, P. R. China
3 Hebei Unipharm. Co. Ltd., Shijiazhuang 050000, P. R. China
)
Abstract:The discussion on some problems of the φ-pH diagram of the metastable substances in M-H2O system has gone a step further. The problems discussed were: 1) the concentration source of solid substances in water, 2) the way of drawing general φ-pH diagram for arbitrary concentration aqeous substance and 3) the functional characteristics of φ-pH diagram and thermodynamics quantities, obtained by using the stable structure of homogeneous system.
Key words: Pourbaix diagram metastable φ-pH diagram relative stability exponent DMi of thermodynamics