凝固点降低法测相对分子质量教学实验的改进  

Improvement for the Relative Molecular Weight Determination of Teaching Experiment by Freezing point fall method

作　　者：刘文芳[1] 王连连 赵军[1] Liu Wenfang;Wang Lianlian;Zhao Jun(Department of Chemistry,Baotou Normal College NeimengguBaotou 014030)

机构地区：[1]包头师范学院化学学院,内蒙古包头014030

出　　处：《科技风》2020年第21期18-19,共2页

基　　金：校级质量工程——校级优秀课程(01036023/011/043)。

摘　　要：凝固点降低法是测定物质相对分子质量的最常用方法。考虑到目前实验教学中实验试剂的绿色环保和实验操作所造成的偏差,打破常规的手动搅拌,通过水-尿素体系测尿素的相对分子质量,减少了环境污染,实现绿色环保的教学理念。该实验已广泛应用于本科生实验教学中并取得良好的教学反馈。The molecular weight is determined by freezing point fall method in most cases.At present,the deviation made by the environment friendly of experiment reagent and experimental operation are not considered,break the normal hand stirring procedure,the molecular weight of carbamide is determined by the system of the water-carbamide,environmental pollution is decreased,the environment friendly of teaching idea is achieved.It is widely used for the experimental teaching,and achieving well teaching feedback.

关 键 词：凝固点降低 相对分子质量 实验改进 

分 类 号：O642.1[理学—物理化学]