University Chemistry ›› 2021, Vol. 36 ›› Issue (2): 1912054.doi: 10.3866/PKU.DXHX201912054

• Chemistry Laboratory • Previous Articles     Next Articles

Exploration and Practice of Undergraduate Self-Design Experiments: Based on the Disposal and Analysis of Wastewater Containing Chromium Ion

Tianjiao Fan1, Qizhi Yao1,2(), Gu Jin1   

  1. 1 School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
    2 National Demonstration Center for Experimental Chemistry Education(University of Science and Technology of China), Hefei 230026, China
  • Received:2019-12-18 Accepted:2020-02-06 Published:2020-02-24

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Abstract:

Self-design experiment is one of the important links in the teaching system of analytical chemistry laboratory in our university. In this paper, the chromium-bearing wastewater produced in the teaching process of analytical chemistry lab class is taken as the treatment object. Students are required to independently consult the literature, design their experimental schemes, and evaluate the feasibility of their schemes. On this basis, the self-design experiments are carried out, and the harvested results are analyzed and evaluated. The implementation of the teaching process trains not only the students' ability to analyze and solve problems, but also their innovative thinking consciousness.

Key words: Wastewater containing chromium ion, Self-design experiment, Feasibility analysis, Potassium dichromate crystal, Comprehensive experimental ability, Open laboratory teaching