金属铬配合物制备和分裂能测定的实验改进  

Experimental Improvements in Preparation of Metal Chromium Complexes and Determination of Its Splitting Energy

作　　者：戴小敏[1] 冯凌竹 DAI Xiao-Min;FENG Ling-Zhu(College of Environment and Chemical Engineering,Dalian University,Dalian 116622,China)

机构地区：[1]大连大学环境与化学工程学院,辽宁大连116622

出　　处：《化学教育（中英文）》2021年第12期47-51,共5页Chinese Journal of Chemical Education

基　　金：大连大学本科教学改革研究项目2018。

摘　　要："金属铬配合物制备和分裂能测定"是大学化学的综合性实验,该实验存在药品量过大、铬废液过多、实验耗时长及实验条件不够优化等问题。为此对该实验提出改进方案:(1)微型实验代替常规实验;(2)紫外分光光度法代替分光光度法;(3)实验条件优化。改进后的实验教学设计具有探究性、绿色环保、节约成本、省时及准确性高等优点。通过本实验,增强了学生节能减排意识,激发了学生对科学研究的兴趣,培养了学生实践能力和善于思考的科学精神。Preparation of metal chromium complex and determination of its splitting energy is a comprehensive experiment in university chemistry experiment course.It is found that there are too many problems such as excessive amounts of medicines,excessive chromium waste,long experimental time and insufficient optimization of experimental conditions etc.To solve these problems,the experiment was improved in three points.Firstly,microscale-experiments were used instead of conventional experiments;secondly,ultraviolet spectrophotometry was used for determination instead of spectrophotometry.Lastly,optimization of experimental conditions was found.There were many advantages of the improved experiment in inquiry of teaching design,environmental protection,low-cost,short time and high accuracy.Through this experiment,students’awareness of energy saving and emission reduction would be enhanced,while students’interest in scientific research would be stimulated,and students’practical ability and scientific spirit of thinking would be cultivated.

关 键 词：铬配合物 分裂能 实验改进 紫外分光光度法 

分 类 号：O641.4-4[理学—物理化学] G642.423[理学—化学]