“元素化学实验”中的热致变色现象(二)——部分Cr(Ⅲ)化合物的热致变色现象及其变色机理探讨

Thermochromic Phenomena in“Elemental Chemistry Experiments”(II):Thermochromic Phenomenon and Discussion on Thermochromic Mechanism of Some Cr(Ⅲ)Compounds

在认识部分Co(Ⅱ)化合物的热致变色现象及变色机理的基础上,因势利导,创设问题“情境”,即再通过生动直观的演示实验,引导学生进一步认识一些Cr(Ⅲ)化合物的热致变色现象及其影响因素,引导和启发学生探讨和解释其热致变色的机理。进一步培养学生的观察、分析、判断、归纳、推理、总结和探索规律的能力以及“批判性”思维能力。

Based on the understanding of the thermochromic phenomenon and mechanism of some Co(Ⅱ)compounds,the problem“situation”was created according to the situation.Namely,through vivid and intuitive demonstration experiments,students are guided to further understand the thermochromic phenomenon of some Cr(Ⅲ)compounds and its influencing factors,and to explore and explain the thermochromic mechanism.It also furtherly cultivate the students’ability of observation,analysis,judgment,induction,reasoning,summary and exploration of laws and“critical”thinking.