凝固点降低法测定摩尔质量实验体系的绿色化研究  

Green chemical research on experimental system of determining molecular weight by freezing point fall method

作　　者：孟庆民[1] 俞英[1] 黄海燕[1] 张民[1] 杨娣红 高成地[1] 

机构地区：[1]中国石油大学(北京)理学院,北京102249

出　　处：《实验室科学》2016年第1期33-35,38,共4页Laboratory Science

摘　　要：通过对苯-萘、环己烷-萘、水-蔗糖、水-葡萄糖、水-尿素体系的凝固点降低值和溶质在溶剂中溶解快慢进行了反复实验。将测得的摩尔质量与理论摩尔质量值进行比较,得出了(相对)最佳的绿色实验体系。该实验体系已在2013级学生实验中应用,取得了很好的实验效果。同时用精密数字温度温差仪替代贝克曼温度计,以减少污染。进而向学生渗透绿色化学理念。By the repeating research of the falling value of freezing point and the dissolving rate of solute in solvent in Benzene-Naphthelene,Cyclohexane-Naphthelene,Water-Sucrose,Water-D-Glucose,Water-Urea systems and by comparing the molar mass that we measured with the theoretical molar mass,we find the best（ relatively） green systems（ Water-Urea）. The green systems have been applied in the experiments of the grade 13 students,and it proved to be a desired result. Meanwhile the precision digital temperature differential instrument is used to replace the Mercury Beckmann thermometer to reduce pollution. Therefore students can get to know the green chemistry better.

关 键 词：凝固点降低 摩尔质量 绿色化研究 

分 类 号：O652.1[理学—分析化学]