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一类反应离子反应:有离子参加的反应称为离子反应。由于电解质溶于水的同时电离成离子,所以电解质在溶液里能起的反应,实质上是离子之间的反应。离子反应发生的本质是反应前后离子数目发生了变化,常见的主要类型及反应条件有:1.复分解反应①生成难溶物质;②生成挥发性物质;③生成难电离物质。实际就是向离子总浓度降低的方向进行。2.离子间的氧化还原反应①置换反应:金属或非金属间的相对活泼性强弱。②一般离子间的氧化还原反应:生成氧化性和还原性更弱的物质。③原电池和电解池中的离子反应:氧化性强和还
A class of reactive ion reactions: ions participate in the reaction known as the ion reaction. Since the electrolyte is ionized into ions while in water, the reaction that the electrolyte plays in the solution is essentially a reaction between the ions. The nature of the ion reaction is the number of ions before and after the reaction has changed, the common main types and reaction conditions are: 1. Metathesis reaction ① generate insoluble substances; ② generate volatile substances; ③ produce difficult to ionize substances. The actual is to reduce the total ion concentration in the direction. 2. Redox reaction between ions ① displacement reaction: the relative activity of metal or non-metallic between the strength. ② general redox reaction between ions: the formation of less oxidizing and reducing substances. ③ primary cell and electrolytic cell ion reaction: strong oxidizing and also