钠与水反应的实验再改进

The Experiment of Sodium Reacting with Water is Improved Again

钠与水反应实验是高中化学中的一个重要实验。在教学过程中,为弥补苏教版化学教材中未涉及收集检验产生的气体,笔者在课堂实践中想要探究该气体,通过查阅资料发现,已有诸多检验钠与水反应产生的气体的实验方法,但仍不是非常简便。笔者在向太平的设计实验基础上对该实验进行了改进,使得氢气的产生与收集都处于密闭状态,且氢气的纯度也得到了保证。装置具有安装简便、操作简单、现象明显、危险系数小等优点,使用该装置可进一步提高教学质量,提高学生的学习积极性,培养学生的科学探索精神。该装置可供广大一线教师推广使用。

Sodium and water reaction experiment is an important experiment in high school chemistry.In the teaching process,in order to make up for the lack of collection of gas generated by inspection in the chemistry textbook published by Jiangsu Education Press,the author wants to explore the gas in class practice.Through consulting the data,it is found that there are many experimental methods for testing the gas generated by the reaction of sodium and water,but they are still not very simple.On the basis of the design experiment of Xiang Taiping,the author improved the experiment so that the generation and collection of hydrogen are in a sealed state,and the purity of hydrogen is also ensured.The device has the advantages of simple installation,simple operation,obvious phenomenon,small danger coefficient and the like.The use of the device can further improve the teaching quality,improve the learning enthusiasm of students and cultivate the scientific exploration spirit of students.The device can be popularized and used by most front-line teachers.