学生在做实验时,由于操作不规范,常会出现试管底部被击穿而其他部位保持完好的现象,感觉弃之可惜,便收集起来。经过反复的实验对照并将之应用于教学,发现“漏洞试管”有妙用。1用在制取C2H2的发生装置中a.实验用品:底部有漏洞的试管、单孔橡皮塞、导管、烧杯、饱和食盐水、电石 When students do experiments, due to non-standard operations, the phenomenon that the bottom of the test tube is punctured and other parts remain intact will feel like a pity. After repeated experiments comparing and applying it to teaching, it was discovered that “vulnerabilities test tubes” have a magical effect. 1 used in the preparation of C2H2 generating device a. experimental supplies: the bottom of a hole in the test tube, a single hole rubber stopper, catheter, beaker, saturated salt solution, calcium carbide