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一、通过仔细审题对目的要求进行明确在审题的时候一定要先将题目中给出的已知条件进行一一罗列,然后确定本题考查的知识重点,做好对题目中的关键词、化学用语等提示信息的理解。例1 X、Y、Z均由短周期元素组成,且均是比较常见的氧化物,X能够与水发生反应,生成一种有还原性不是很稳定的二元酸,那么这个酸的化学式为__;Y与X的构成元素一样,那么Y的化学式为___。解题对策:审清相关题意,明确该题是对
First, through a careful examination of the purpose of the requirements clear in the examination of the time when the subject must be given the known conditions are listed one by one, and then determine the subject of the examination of knowledge, do the keywords in the title, chemical terms Such as the understanding of the prompt information. Example 1 X, Y, and Z are all composed of short-period elements and are relatively common oxides. X can react with water to form a dibasic acid with a reducibility that is not very stable. The chemical formula of this acid is __;Y is the same as the constituent element of X, so the chemical formula of Y is ___. Problem-solving measures: review the relevant questions and make it clear that the question is correct