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原电池知识是中学化学理论的重点之一,其中涉及原电池电极的判断与电极反应式书写内容的考题在历年的高考试卷中经常出现.总结近几年各地高考题中对电极反应式书写的考查,可以发现试题类型可谓多样、题目情形可谓标新立异,不论哪种类型,按照下列方法均能快速正确书写电极反应式.第一步:找出化合价的变化,负极找化合价的升高,失电子的数目,正极找化合价的降低,得电子的数目并按照总反应的反应物、产物书写出来;
Primary battery knowledge is one of the focuses of chemistry theory in secondary schools, including the judgment of the primary battery electrode and the content of the electrode reaction writing test questions often appear in the college entrance examination papers over the years.Conclusion In recent years, college entrance examination questions around the electrode reactive writing Test, you can find the test questions can be described as diverse, subject matter can be described as unconventional, no matter what type, in accordance with the following methods can quickly and accurately write the electrode reaction .First step: to find valence changes, the negative looking for valence, loss of electrons The number of positive looking for the reduction of valence, the number of electrons and in accordance with the total reaction of reactants, the product written out;