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一、绪言四元交互水-盐体系系由无公离子的两个盐和水构成的一种体系。在这里我们设想体系中的两个盐都不水解,这样体系的恒压恒温状态图是借一规则棱錐体表示的。此棱錐体的底为一正四方形,四个側面都是等边三角形,这些三角形海边之长等于棱錐体底部正四方形一边之长。棱錐体的頂点O代表水,而底部正四方形的四个角頂分别代表交互水盐体系 AX+BY=AY+BX中的四个盐。AX和BY及AY和BX为此体系的两个交互盐对,每个盐对中的两个盐分别由底部正四方形中一个对角线的两个端点表示。图1为表示四元交互水-盐体系在恒压恒温条件下状态图的規則棱錐体。在研究四元交互水-盐体系时,都是采用此空间图
I. INTRODUCTION The four-element interactive water-salt system consists of two systems of salt and water that are free of cations. Here we envisage that both salts in the system are not hydrolyzed, so that the system’s constant temperature isothermal state diagram is represented by a regular pyramid. The bottom of the pyramid is a regular square, the four sides are equilateral triangles, the length of these triangles is equal to the sea at the bottom of the pyramid at the square of the long side. The vertices O of the pyramids represent water, and the four corners of the bottom tetragon represent the four salts of the interactive water salt system AX + BY = AY + BX, respectively. AX and BY and AY and BX are two interactive salt pairs for this system. The two salts in each salt pair are represented by the two end points of one diagonal line in the bottom regular tetragon. Figure 1 is a regular pyramid representing the state diagram of quaternary interacting water-salt system under constant temperature and constant temperature. In the study of quaternary interactive water - salt system, are using this spatial map