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Citation: YIN Jie, DAI Jianrong, XIONG Shixian, QIAO Yanling, ZHOU Huawei. Change from “Validation Mode” to “Dialectical Mode”: to Further Enhance Experimental Innovation of Undergraduates[J]. University Chemistry, ;2018, 33(3): 21-26. doi: 10.3866/PKU.DXHX201708016 shu

Change from “Validation Mode” to “Dialectical Mode”: to Further Enhance Experimental Innovation of Undergraduates

YIN Jie ^1,2, ,
DAI Jianrong ³ ,
XIONG Shixian ⁴ ,
QIAO Yanling ^1,2 ,
ZHOU Huawei ^1,2

1.
School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, Shandong Province, P. R. China;
2.
College of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, Shandong Province, P. R. China;
3.
Shenxian No.2 Middle School, Shenxian 252400, Shandong Province, P. R. China;
4.
Shenxian No.1 Middle School, Shenxian 252400, Shandong Province, P. R. China

Received Date: 21 August 2017

In order to further enhance experimental innovation of the undergraduates, the "verification model" in laboratory courses should be changed urgently. How to improve and develop the undergraduate laboratory courses has become an important direction of the laboratory teaching mode for university teachers. The students are easier to observe and understand the nature and core of the experiment by changing the experimental conditions and dialectically viewing of experimental problems. This kind of "dialectical view" is a good developing trend. We will apply this kind of model to the experiment of preparation of ammonium ferrous sulfate and semi-quantitative analysis of iron (Ⅲ). The students can deeply discuss the differences in the experimental results by controlling the synthesis conditions. The different colored and sized of crystalline in turn can stimulate students' interest. Practice shows that this teaching model is conducive to promoting students' ability of independent inquiry learning, to cultivate their dialectical experimental thinking, thus to enhance students' practical and innovative ability, and to improve their comprehensive quality. This model can be extended to other experiments.
- Validation mode,
- Dialectical mode,
- Ammonium ferrous sulfate
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