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一、循序渐进法循序渐进法有顺推法和逆推法。当框图中给出了起始物质时,采用顺推法,即根据框图中的关系,结合有关化学知识,依题意的层次结构,沿着一条链一步一步往某个方向走,分析递变过程而获解。当框图中给出了生成物时,采用逆推法,即以最终产物作为起点,层层逆推,形成思路,得出结论。解题的关键是要熟练掌握已知物的俗名、组成和性质。
First, the gradual and orderly law The law of gradual and orderly and reverse law. When the starting material is given in the block diagram, the method of deduction is adopted, that is, according to the relationship in the block diagram, in combination with the relevant chemical knowledge and according to the intended hierarchical structure, step by step along a chain in one direction and analyze the change Solved the process. When the product is given in the block diagram, the reverse method is used, that is, the final product is taken as a starting point, and the layers are inversely pushed back to form a train of thought, and a conclusion is drawn. The key to solving the problem is to master the common name, composition and nature of the known things.