电子得失或共用电子对的偏移是氧化还原反应的本质特征.任何氧化还原反应都遵循得失电子守恒规律.同学们对氧化剂、还原剂都只有一种物质的反应,感觉分析起来非常容易,但是遇到稍微复杂的反应,比如多重氧化还原的反应,同学们往往把握不了关键,不能正确地分析.若依据守恒规律,不仅整体电子得失守恒,而且局部 The offset of electron gain and loss or common electron pair is the essential characteristic of redox reaction. Any redox reaction follows the law of gain and loss of electrons. Students have only one kind of reaction of oxidant and reducing agent, and the sensory analysis is very easy, but In response to a slightly more complex reaction, such as a multiple redox reaction, students often cannot grasp the key and cannot properly analyze it. According to conservation laws, not only the overall electron gains and losses are conserved, but also partially.