分析试剂所起作用的解释,是分析化学理论的重要任务之一。曾有一种学说,企图单纯以离子与周围的静电作用来解决这个问题。按此,则只需要离子的电荷及半径就可以了。但是,它不能说明各种离子反应的特殊性。比如,Mg~(++)、Ni~(++)、Fe~(++)、Zn~(++)、Co~(++)、Cu~(++)的电荷与半径都相似,其生成共价键的倾向却各有不同。因此,现在希望能提出一个比较全面的解释。苏联的络合物化学家雅西米尔斯基建议以二个数 Analysis of the role of reagents to explain the analysis of chemical theory is one of the important tasks. There was a doctrine that attempted to solve this problem simply by the action of ions and the surrounding static electricity. Click here, then only the ionic charge and radius on it. However, it can not explain the particularity of various ion reactions. For example, the charge and the radius of Mg ~ (++), Ni ~ (++), Fe ~ (++), Zn ~ (++), Co ~ (++) Their tendency to generate covalent bonds is different. Therefore, I hope now I can come up with a more comprehensive explanation. The Soviet complex chemist Iasi Millski suggested two numbers