论文部分内容阅读
一、实验在教材中所处的地位和作用银镜反应是醛类物质的重要反应之一,是检验醛基的特性实验,也是高中化学试验中经典实验之一,对于了解醛的性质,突破醛类性质学习的重难点具有举足轻重的作用,银氨溶液的配制,特别是银镜反应的书写表达是学习醛类性质的重点、难点,该试验有利于扩展学生对氧化反应的理解,拓宽学生认识问题的广度和深度,同时也为后面学习糖类知识打下基础。
First, the experimental position in the textbooks and the role Silver mirror reaction is one of the important reactions of aldehydes, is to test the characteristics of aldehyde-based experiments, but also one of the classic experiments in high school chemistry experiments, for understanding the nature of aldehydes, a breakthrough The heavy difficulty of aldehyde nature learning plays a decisive role. The formulation of silver ammonia solution, especially the expression of silver mirror reaction, is the key and difficult point in the study of the aldehyde nature. This experiment is beneficial to expand students ’understanding of oxidation reaction and broaden students’ Understand the breadth and depth of the problem, but also lay the foundation for further study of carbohydrate knowledge.