高一化学 简单分类法及其应用(A simple chemical classification method and its application).docVIP

高一化学 简单分类法及其应用(A simple chemical classification method and its application).doc

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高一化学 简单分类法及其应用(A simple chemical classification method and its application)

高一化学 简单分类法及其应用(A simple chemical classification method and its application) A simple classification method and its application The classification method is a method of learning scientific knowledge and engaged in scientific research, simple and effective. According to the need can have different classification methods, such as cross classification, tree classification etc.. 1. cross classification A classification method based on standard has certain limitations, can provide less information, less people in understanding things often requires a variety of classification methods to compensate for a single classification method. To the material classification, using the cross classification method can provide a comprehensive analysis of material from different angles, such as the classification of salt can be from the perspective of anion and cation. And as in junior high school, we can according to the reactants and products category and species number of the reaction, chemical reaction for chemical reaction, decomposition reaction, substitution reaction and metathesis reaction of four basic types. Again according to the material whether oxygen or loss of oxygen in the reaction, the chemical reaction is divided into oxidation and reduction reactions. Like the C + O2 CO2 this reaction, according to the former classification method belongs to the chemical reaction, according to a classification method which belongs to the oxidation reaction (also in the high school stage for the concept of redox reaction is a new definition). Different classification methods to study the problem from a different perspective, in the back of the study, we will according to whether in ion chemical reaction is divided into ionic and nonionic reaction reaction. The 2. tree classification method Any science, in order to study, first of all the research object, tree classification method has been widely used in chemistry, chemistry of our study will be of great help, we use the material class

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