一、离子反应的定义1.离子反应定义的多种表述方式(1)在溶液里有离子参加的反应,称为离子反应。(2)在反应中有离子参加或有离子生成的反应称为离子反应。(3)在水溶液里有电解质参加的反应就是离子反应。(4)在溶解或熔融状态下,有电解质参加的反应即为离子反应。2.对离子反应定义多种表述方式的讨论“(1)”有两点不足:①离子反应可以在溶液中进行,也可以在熔融状态下进行。该定义遗漏了离子反应可以在熔融状态下发生的条件。②一般条件下,离子是否参加了反应,仅凭肉眼是观察不出来的。和“(3)”比较就可看出,该定义的直接性也不够。因为“(3)”直接指向了离子的“渊源”——电解 First, the definition of ion reaction 1. Ion reaction definition of a variety of expressions (1) ions in the solution to participate in the reaction, known as the ion reaction. (2) In the reaction of ions to participate in or have ion generation reaction is called ion reaction. (3) The electrolyte reaction in the aqueous solution is ion reaction. (4) In the dissolved or molten state, the reaction that the electrolyte participates in is the ion reaction. 2. Definition of ion reactions to define a variety of ways to discuss “(1) ” There are two deficiencies: ① ion reaction can be carried out in solution, can also be carried out in the molten state. This definition leaves out the conditions under which the ionic reaction can take place in the molten state. ② Under normal conditions, whether or not the ions have participated in the reaction can not be observed by the naked eye alone. And “(3) ” can be seen that the definition of the immediacy is not enough. Because “(3) ” points directly to the ion's “origin” - electrolysis