凝固点降低法测定摩尔质量实验装置的改进  

Improvement of experimental apparatus for the determining molar mass with freezing point depression

作　　者：裴渊超[1] 张虎成[1] 赵扬[1] 张树霞[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《实验室科学》2011年第4期174-176,共3页Laboratory Science

基　　金：国家级实验教学示范中心建设项目(项目编号:教高函[2009]5号文件)

摘　　要：对常用的凝固点降低法测定有机物摩尔质量实验装置做了改进,研究了环己烷+萘和水+蔗糖体系的步冷曲线,确定了溶液的凝固点。改进后的装置操作方便,使实验结果精确度大大提高,相对误差可以控制在1%左右。The traditional device for the determining molar mass with freezing point depression was improved. The cooling curves of cyclohexane ＋ naphthalene and H20 ＋ sucrose systems were studied, and the freezing points of these systems were also determined. The improved device is easy to operated. The results imply that the precision and accuracy of the measurement were improved very well and its measuring error can be controlled about 1%.

关 键 词：凝固点 装置改进 摩尔质量 

分 类 号：O645.15[理学—物理化学]