【摘要】 以"二氧化碳相对分子质量的测定"为例,分析了传统实验中存在的试剂用量大、"三废"排放多等问题,以绿色化学为突破口,采用氢氧化钠-酚酞溶液替代火柴进行验纯,使用注射器代替碘量瓶集气,通过上述方法对实验进行优化设计,达到了绿色化、准零排放的要求,可以增强学生的环保意识。更多还原

【Abstract】 The following problems in traditional experiments of determination of CO₂ molecular weight are analyzed, for instance, too much reagent consumption and "three wastes" emissions. Based on green chemistry principle some optimizing schemes, such as purity test with mixed solution of sodium hydroxide and phenolphthalein instead of matches, and gathering gas in injector instead of iodine flask were proposed. The improved experiment meets the requirmends of green chemistry and can make students understand the importance of the ecological environment.更多还原