Abstract:

In this experiment, the purification of crude salt, the preparation of soda and the determination of sodium carbonate content in mixed alkali were integrated, and a comprehensive and designed experiment of university chemistry was developed. Students' independent design was introduced in the part of the purification of crude salt, and Hou's soda production system was introduced in the part of the preparation of soda. The experiment can make the students to consolidate the basic operation skills such as vacuum filtration, crystallization, titration, mastering a large number of chemical reaction principles and methods involved in the preparation of the soda ash, to exercise the ability of comprehensive application of knowledge, and improve the comprehensive innovation quality. Meanwhile, combining with ideological education, it can also help stimulate students' patriotic feelings and interest and enthusiasm of chemistry discipline, and cultivate students' awareness and ability to solve practical problems.

Key words: Soda ash, Hou's soda production system, Independent design and purification of crude salt, Comprehensive experiment