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酸碱滴定和络合滴定均为滴定分析法。它们有许多共性,又各有其特点。 一、通过酸碱滴定和络合滴定的对比,掌握滴定分析的一般原理和步骤 二、酸碱滴定和络合滴定各自的特点及应该掌握的重点问题 酸碱滴定 1.质子化酸碱理论 凡能给出质子的物质均称为酸,凡能接受质子的物质均称为碱。这里要注意共扼酸碱对的概念。 对于多元弱酸(碱)的两性物质来说,要注意找准它们对应的共扼酸碱关系和酸碱离解常数。例如H_2PO_4~-是两性物质,它作为酸,其共扼碱是HPO_4~(2-),而作为碱,其共扼酸是H_3PO_4。
Both acid-base and complexometric titrations are titration assays. They have many common features and their own characteristics. One, through the comparison of acid-base titration and complexometric titration, grasp the general principles and steps of titration analysis Second, the characteristics of each acid-base titration and complexation titration and the key issues that should be mastered Acid-base titration 1. Protonated acid-base theory Substances that give protons are called acids, and those that can accept protons are called alkalis. Here we must pay attention to the concept of guanidine-base pairs. For the multiple weak acid (base) amphoteric substances, we must pay attention to their corresponding guanidine acid-base relationship and acid-base dissociation constants. For example, H_2PO_4~- is an amphoteric substance. As an acid, its symphonic base is HPO_4~(2-), while as a base, its decanoic acid is H_3PO_4.