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作为高中化学学科中的重要组成部分,氧化还原反应在必修课程中主要以“化学物质及其变化”“化学反应与能量”呈现,选修课程以“电化学基础”为主,这些知识内容除在高考试卷中有一定涉及外,也是提高学生化学学科素养的关键。但值得注意的是,当前各阶段氧化还原反应教学方面取得的效果并不理想,学生在计算方面仍表现出明显的困惑,需要行之有效的计算教学策略。一、高中不同阶段氧化还原反应计算教学现状1.必修阶段氧化还原反应计算教学高中必修阶段中的氧化还原反应计算,涉及的内容较多,如计算元素化合物化合价变化、确定还原剂与氧化剂等,再如电荷数、电路转移电子数的计算等。实际教学中,存在的问题
As an important part of high school chemistry, redox reactions are mainly represented by “chemical substances and their changes” chemical reactions and energy “ in compulsory courses, and elective courses are based on ”electrochemical fundamentals". This knowledge content is not only involved in the examination paper but also is the key to improving the student’s chemistry literacy. However, it is worth noting that the current results of the teaching of redox reactions in various stages are not satisfactory. Students still show obvious confusion in calculations and need effective computational teaching strategies. I. Teaching status of redox reaction calculation in different stages of senior high school 1. Computation of redox reaction in the required phase of teaching high school in the compulsory phase Calculation of the redox reaction in the compulsory high school teaching phase involves more content, such as calculating the valence change of the element compound, determining the reducing agent and oxidant, etc. Another example is the calculation of the number of charges and the number of transferred electrons in the circuit. Problems in practical teaching