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现行人教版全日制普通高级中学教科书(必修加选修)化学第二册第151页的【实验6-2】:在大试管里注入2mL左右无水乙醇,再放入2小块新切开用滤纸擦干的金属钠,迅速用一配有导管的单孔塞塞住试管口(图1-a),收集反应中放出的气体并验纯。确信气体的纯度后,在导管口点燃,观察气体燃烧的现象;然后把一凉的干燥小烧杯罩在火焰上方
Current PEP version of the full-time ordinary high school textbooks (compulsory plus elective) Second Chemistry Page 151 of 【Experiment 6-2】: In a large test tube into about 2mL of ethanol, then add 2 small pieces of new incision The metal sodium dried over the filter paper was quickly plugged into the test tube port (Figure 1-a) with a single-bore plugged catheter to collect the gas evolved during the reaction and to verify the purity. Confirm the purity of the gas, ignite in the mouth of the catheter and observe the phenomenon of gas burning; then cover a cool dry beaker over the flame