凝固点降低法测定摩尔质量实验的优化改进

Optimization and Improvement of the Determination of Molar Mass by Cryoscopy

在经典的凝固点降低法测定摩尔质量实验装置基础上,针对搅拌、保温以及温度监测等方面进行了改进.利用带热电偶的磁力搅拌器调节转速,同时监测寒剂温度,并制作了半封闭的泡沫保温层,保温的同时便于观察体系变化.改进的装置经学生实际测试,实验效果好,容易操作与维护.

On the basis of the classical experimental device for determining the molar mass by cryoscopy method,improvements were made in aspects of agitation,insulation and temperature monitoring. A magnetic stirrer with a thermocouple is used to adjust the speed,and the temperature of the cold agent is monitored at the same time. A semi closed foam insulation layer is made for insulation,which is convenient to observe the change of the system.The improved device is tested by students,the experimental results are good and it is easy to operate and maintain.