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中学生在初中三年级时,就对氧化-还原反应有所了解。可是,从电子观念为出发点的氧化-还原反应,按目前的教材系统来看,要到高中三年级才讲。因而,讲课之后,如果教师不通过经常的教学反复巩固,学生对这一概念的一知半解就很难避免。“氧化-还原反应”一书,是根据中学化学教学大纲的教材范围编写的,是帮助教师讲解和巩固氧化-还原反应的参考书。全书共分两个主要部分:第一部分介绍以电子观念为基础的氧化-还原反应理论;第二部分介绍中学课程中氧化-还原反应理论的教学法。当我读过这本书以后,深感由于原著者的意图是在于帮助中学教师解决有关问题,所以这本书就与高等学校教材等其它参考材料有所不同。主要的是:一、有许多习题可以直接采用。本书第一部分有一些习题;第二部分更针对电离学说、电解、金属活动顺序、过氧化物、铝、铁、氢、卤素、氧族、氮、磷、碳等问题提出了各种类型的习题。象“最强的氧化剂是什么?”“最强的还原剂是什么?”“在2FeCl_3+2HI→2FeCl_2+I_2+2HCl 和 Zn+2HI→ZnI_2+H_2这两个反应中,什么是氧化剂?什么是还原剂?氢碘酸在这些反应中的作用是否相同?”等,都较富有思考性。二、有些内容可以用作课堂演示、实验或化学课外活动小组实验的材料。象“将亚硫酸注入硫化氢水
Middle school students in the third grade junior high school, on the oxidation - reduction reaction to understand. However, from the electronic concept as the starting point of the oxidation - reduction reaction, according to the current textbook system, to third grade high school before they speak. Thus, after the lecture, if the teacher does not repeatedly consolidate through regular teaching, students know very little about this concept is difficult to avoid. The book “Oxidation - Reduction Reaction” is based on the scope of teaching materials for secondary chemistry syllabus and is a reference book to help teachers explain and consolidate oxidation-reduction reactions. The book is divided into two main parts: the first part introduces the concept of oxidation-reduction based on electronic theory; the second part introduces the middle school curriculum oxidation-reduction reaction theory teaching method. When I read this book, I felt deeply that since the original author’s intention was to help middle school teachers solve the problems, this book differed from other reference materials such as the textbooks for colleges and universities. The main is: First, there are many exercises can be used directly. The first part of the book has some exercises. The second part presents various types of questions about ionization theory, electrolysis, metal activity sequence, peroxide, aluminum, iron, hydrogen, halogen, oxygen, nitrogen, exercise. “What is the strongest oxidant?” “What is the strongest reductant?” “What are oxidants and what are the two reactions of 2FeCl_3 + 2HI → 2FeCl_2 + I_2 + 2HCl and Zn + 2HI → ZnI_2 + H_2 Is the reductant? Hydriodic acid in these reactions are the same? ”And so on, are more pondering. Second, some of the content can be used as a classroom demonstration, experimental or chemical extracurricular activities group experimental materials. Like "the sulfurous acid into hydrogen sulfide water