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高等学校试用教材《无机化学实验》(中山大学、辽宁大学等校编,人民教育出版社1978年出版)实验四,杜马法测定四氯化碳的分子量,存在以下几个问题: 1.杜马球耗损量甚大,四氯化碳试剂用量过多。 2.天平称量杜马球不方便。 3.实验操作较复杂。 4.实验值与理论值比较,误差较大。为此,我们改进了实验仪器和操作条件,其测定实验如下。一、实验原理在一定温度和压力下,使四氯化碳液体在
Experimental teaching materials in colleges and universities “Inorganic Chemistry Experiment” (Zhongshan University, Liaoning University School Editing, People’s Education Press, 1978) Experiment IV, Duma determination of carbon tetrachloride molecular weight, there are several questions: 1. Du Polo wear a lot, too much carbon tetrachloride reagent. 2. Balance Weighing Dumas ball inconvenient. 3. Experimental operation is more complicated. 4. The experimental value and the theoretical value, the error is larger. To this end, we have improved the experimental equipment and operating conditions, the determination of the experiment is as follows. First, the experimental principle At a certain temperature and pressure, so that carbon tetrachloride liquid in