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1 不同浓度苯甲酸-异丙醇体系沸点升高法的数据

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(苯甲酸) 相对误差 1 46.5400 0.0000 0 82.362 – – – 2 46.5400 0.2306 0.5 : 100 82.429 0.067 116.3 −4.76% 3 46.5400 0.4710 1.0 : 100 82.490 0.128 124.4 1.86% 4 46.5400 0.7061 1.5 : 100 82.549 0.187 127.7 4.57%