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(接上期)二、重要化工产品的制备实验此类试题常以某一物质的制备为主线,将科学探究和真实的化工生产背景设计成一定的工艺流程图,既能考查考生全面的思维品质,又能考查考生的综合化学知识,图形简洁明了,给考生更大的思考空间,体现了较好的化学学科素养。解题时,应认真审题,选准切入点,抓住物质制备这根主线,结合每一步操作,弄清各步操作流程设计的化学原理、方法和目的,看清关键字词,推理和判断,从而得出正确合理的答案。掌握具体的操作方法,
(Continued) Second, the preparation of important chemical products experiments Such questions often take the preparation of a substance as the main line, the scientific inquiry and the real chemical production background designed into a certain process flow chart, both to examine the overall quality of thinking , But also examine the candidate’s comprehensive chemical knowledge, graphic concise, giving candidates a greater space for thinking, reflecting the better chemistry discipline. When solving problems, we should carefully examine questions, choose the right starting point, and grasp the main line of material preparation. Combining each step of operation, we can understand the chemical principles, methods and purposes of the design of each step of operation flow, and find out the key words, reasoning and judgment , To arrive at the correct and reasonable answer. Grasp the specific method of operation,