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原电池知识一直是高考考纲的重点内容,电极反应式的书写是难点不易掌握。为防止考试失分,要注意以下几点:找出电池内自发的氧化还原反应,关注电解质溶液是否参与反应。标电子的得失,用好元素守恒、电荷守恒和电子守恒。原电池电极反应式书写的总原则是:负极:失电子,发生氧化反应(一般是负极本身失电子)
The original battery knowledge has always been the focus of the college entrance examination syllabus, electrode reaction is difficult to grasp the writing difficult. In order to prevent the test from losing points, pay attention to the following points: Find out the spontaneous oxidation-reduction reaction in the battery, and pay attention to whether the electrolyte solution is involved in the reaction. The pros and cons of standard electronic, conservation of good elements, conservation of charge and conservation of electrons. The original principle of reactive electrode writing is: Negative: loss of electrons, the oxidation reaction (usually the negative electrode itself lost electrons)