【摘要】 在酸碱平衡及络合平衡中,利用分布分数可以定量地说明不同条件下溶液中各种组分的分布情况,据此可以绘制优势区域图。利用优势区域图不仅能够简单、直观、方便地分析优势分布的情况,还可用于处理许多关于平衡和滴定的问题。结合具体的实例对于优势区域图的绘制及在分析化学教学中的应用进行了论述。更多还原

【Abstract】 In acid-base equilibrium and complexation equilibrium, distribution fraction is used to illustrate distribution of all types of components under various conditions. And predominance area diagram(PAD) can be drawn accordingly. Using PAD, it is simple, intuitive, and convenient to analyse dominance distribution. Furthermore, PAD can also be used to resolve many problems related to equilibrium and titration. In this paper, the authors try to discuss plotting and application of PAD in analytical chemistry teaching combined with some specific examples.更多还原