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粒子浓度大小比较试题是一类难度大、综合性强的题型,也是近几年高考的热点之一,全国各地高考化学试卷都涉及这部分内容。那么,如何高效、快速地解答此类问题呢?现以常见试题类型为例,谈谈解题的策略和方法。一、熟悉解题思路,选择分析方法解题的思路依次是:辨溶液(辨别所给的溶液是单一溶质还是多种溶质)→判反应(多种溶质混合时,是否发生化学反应)→找组成(若有反应发生,反应后生成了什么物质,是否有物质过量,找出反应后溶液的真实组成)→写平衡(写出溶液中存在的
The particle concentration comparison questions are a kind of difficult and comprehensive questions, and they are also one of the hottest topics in the college entrance examination in recent years. The chemical examination papers all over the country are involved in this part. So, how to solve such problems efficiently and quickly? Now take common test questions as examples, talk about strategies and methods for solving problems. First, familiar with the problem-solving ideas, choose the analytical method to solve problems in order are: identify the solution (to identify the given solution is a single solute or a variety of solute) → judge the reaction (multiple solute mixed, whether the chemical reaction occurs) → find Composition (if there is a reaction, what is produced after the reaction, whether there is an excess of material, find out the true composition of the solution after the reaction) → write balance (write out the solution