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本文所谓之终点过程,是指在滴定分析中,各种参与滴定反应的组分在临近等当点时,随着滴定剂的加入,其浓度的变化情况。在理论上,这无疑是讨论滴定分析的关键环节。当有指示剂参与终点过程时,情况会变得更为复杂。因此,在下面的讨论中,将理论模型简化到适应研究深度的最简单类型。例如,假设金属离子M与指示剂In只生成1:1的配合物;指示剂分子间不存在缔合反应;除非声明,滴定反应和指示剂反应均不存在副反应。
The so-called end point process, refers to the titration analysis, a variety of components involved in the titration reaction near the equivalent point, with the addition of titrant, the concentration changes. In theory, this is undoubtedly the key to discuss titration analysis. The situation can become more complicated when indicators are involved in the end point process. Therefore, in the following discussion, the theoretical model is simplified to the simplest type to adapt to the depth of the study. For example, assume that the metal ion M and the indicator In form only 1: 1 complexes; there is no associative reaction between the indicator molecules; and unless otherwise stated, none of the titration and indicator reactions present side effects.