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3 苯甲酸-异丙醇体系沸点升高法实验误差

序号 溶剂质量/g 溶质质量/g 溶液沸点/℃ ΔTb/℃ 相对分子量(苯甲酸) 相对误差 1 46.5400 0.4710 82.490 0.128 124.4 1.86% 2 45.0357 0.4501 82.322 0.127 123.8 1.37% 3 40.0193 0.4169 81.210 0.130 126.3 3.44%