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对传统K3[Fe(C2O4)3]·3H2O制备实验进行改造,使其由普通制备实验升级为集制备、组成定量测定和光化学性质实验为一体的综合实验。该综合性实验共需12学时完成,在技术上集配合物制备、减压过滤、蒸发浓缩结晶、重量分析、氧化还原滴定、电导率法测定离子电荷等于一体,在理论上涉及沉淀溶解、氧化还原、配位和光致变色等多种反应类型。该综合性实验对实验设备要求低,教学过程可操作性强,综合性强。经过8年的教学实践发现,该实验能大大激发学生主动思考,拓展了学生思维跨度和深度,取得良好的教学效果。
The traditional K3 [Fe (C2O4) 3] · 3H2O preparation experiment was modified, so that it was upgraded from the general preparation experiment to the set preparation, the composition quantitative experiment and the photochemical experiment as a whole comprehensive experiment. The comprehensive experiment takes a total of 12 hours to complete the technical preparation of complex preparation, vacuum filtration, concentrated by evaporation crystallization, gravimetric analysis, redox titration, conductivity method for the determination of ionic charge is equal to one, in theory, involves precipitation dissolution, oxidation Reduction, coordination and photochromic and other types of reactions. The comprehensive experiment on the experimental equipment requirements are low, the teaching process is operable, comprehensive and strong. After eight years of teaching practice, we found that this experiment can greatly stimulate the students to think actively, broaden the span and depth of students’ thinking and achieve good teaching results.