凝固点降低法电脑自动测定相对分子质量的条件研究

Research on Condition of Determining the Relative Molecular Mass by Freezing Point Depression with Computer

引入凝固点下降实验仪,采用凝固点下降测量应用程序,测定萘的相对分子质量.得到测定溶液凝固点的最佳实验条件为：冰浴温度3.0-4.0℃、搅拌速度120r/min、浓度0.06-0.08 mol/L.测定萘的相对分子质量相对误差为0.53%,小于手动操作的相对误差.

The relative molecular mass of naphthalene was determined by the procedure of measuring congealed point and experimental apparatus of lowering the freezing point.The best experiment condition is the ice bath temperature：3.0～4.0 ℃;Mixing rate of 120r/min;concentration 0.06 ～ 0.08 mol /L. The relative error of the relative quality of the molecule naphthalene obtained was 0.53 %,less than manual operation.