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编者注:电化学知识是高中学习的重点和难点,也是高考的热点,同学们应重点掌握。电化学是高中化学的重要基础理论内容之一,是高考的重点。对广大考生而言,电极反应式的书写是难点。现就电极反应式的书写总结如下。一、原电池中电极反应式的书写1.先确定原电池的正、负极,列出正、负极上的反应物质,并标出相同数目电子的得失。2.注意负极反应生成的阳离子与电解质溶液中的阴离子是否共存。若不共存,则该电解质溶液中的阴离子应写入负极反应式;若正极上的反应物质
Editor’s Note: Electrochemical knowledge is the focus and difficulty of high school learning, but also the hot college entrance examination, students should focus on mastering. Electrochemistry is one of the important basic theoretical content of high school chemistry, is the focus of the college entrance examination. For the majority of candidates, the electrode reaction writing is difficult. The reaction of the writing is summarized below. First, the original battery reactive electrode style writing 1. First determine the positive and negative batteries, lists the positive and negative reactive substances, and marked the same number of electronic gains and losses. 2. Note that the negative reaction of the cation and electrolyte solution of the anion coexist. If not coexist, then the anion in the electrolyte solution should be written into the negative reaction formula; if the positive reaction material