废铁屑制备三草酸合铁酸钾虚实结合的综合化学实验设计

Virtual and Actual Comprehensive Chemical Experimental Design on Preparing Potassium Ferric Oxalate from Scrap Iron Filings

将无机化学中的两个制备实验(硫酸亚铁铵的制备、三草酸合铁酸钾的制备)和分析化学中的组成分析实验(铁离子、草酸根离子和结晶水含量测定)进行综合,设计了一个综合化学实验。在制备部分引入线上虚拟操作和线下自主设计环节,分析部分不仅使用了传统的化学分析法,同时引入红外光谱仪(IR)和X射线衍射仪(XRD)对产品进行表征分析。通过该实验的实施,可使学生进一步巩固减压过滤、重结晶、滴定等基本实验操作技能;掌握利用大型仪器对产品的组成和结构进行表征的方法;锻炼学生综合应用化学理论知识解决实践问题的能力。同时结合思政教育,有助于培养学生的安全环保意识和科学探索精神,提高学生的实验责任心和对化学学科的兴趣。

In this experiment,the preparation of ammonium ferrous sulfate and potassium ferric oxalate,and the determination of iron ion,oxalate ion and crystal water content were integrated to develop a comprehensive chemical experiment.In the preparation part,virtual operation and independent design were introduced.In the analysis and detection part,not only the traditional chemical analysis method was used,but also the infrared spectrometer and X-ray diffractometer were introduced to characterize the product.The experiment can make the students consolidate the basic laboratory skills such as vacuum filtration,recrystallization and titration,master the instrumental for characterizing the composition and structure of products,which can train students’ability to comprehensively apply chemical theoretical knowledge to solve practical problems and develop good scientific research literacy.Furthermore,by combining with ideological education,this experiment can also help cultivate students’environmental protection awareness and scientific exploration spirit,and improve students’sense of responsibility in the laboratory and interest in chemistry.