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案例:通过师生协作完成了氯化铜溶液的电解实验后,学生快速地写出了电极反应。阳极:2Cl--2e-=Cl2,阴极:Cu2++2e-=Cu,总反应:CuCl2电解=Cu+Cl2↑。当学习到氯碱工业电解饱和食盐水时,老师问学生还能写出电极反应和总反应吗?抽了部分学生在黑板上写,其他学生在草稿本上写,老师巡视,多数学生按照氯化铜溶液电解的方式进行书写,有的在翻开书对照,他们发现按氯化铜溶液电解的方式书写与教材上的书写是不相同的,为什么会出现这种情况呢?
Case: After completing the electrolysis experiment of cupric chloride solution through the cooperation of teachers and students, the students quickly wrote out the electrode reaction. Anode: 2Cl - 2e - = Cl2, cathode: Cu2 + + 2e- = Cu, the total reaction: CuCl2 electrolysis = Cu + Cl2 ↑. When learning chlor-alkali industrial electrolysis of saturated saline, the teacher asked the students can write out the electrode reaction and the total reaction? Pumping some students write on the blackboard, the other students in the draft to write, the teacher tour, most students in accordance with the chlorination Copper solution electrolysis way to write, and some open the book control, they found that according to the method of electrolysis of copper chloride solution writing and textbook writing is not the same, why this happens?