沸点升高法测化合物相对分子量实验的改进

熊辉, 吴贝娜, 范子鑫, 郑子豪, 静恩哲, 莫婉玲, 龚跃法

Improvement in the Measurement Method for the Relative Molecular Weight of Compounds Based on Boiling Point Elevation

Hui Xiong, Beina Wu, Zixin Fan, Zihao Zheng, Enzhe Jing, Wanling Mo, Yuefa Gong

表2 不同浓度萘-环己烷体系沸点升高法的实验数据

序号 溶剂质量/g 溶质质量/g 溶质溶剂比 溶液沸点/℃ ΔTb/℃ 相对分子量(萘) 相对误差 1 38.3255 0.0000 0 80.485 – – – 2 38.3255 0.1912 0.5 : 100 80.605 0.120 121.5 −5.6% 3 38.3255 0.3897 1.0 : 100 80.706 0.221 134.5 4.5% 4 38.3255 0.5949 1.5 : 100 80.818 0.333 136.2 5.8%