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对初三《化学》P82实验2-10“钠在氯气中燃烧”,我们作了一些改进,达到反应速度快,现象明显的效果。改进后的实验不需要加热,氯气随用随制,不会外逸而污染空气。其实验装置如下:实验现象:当黄绿色的氯气进入试管数秒钟后,即见管内金属钠逐渐熔化,继后迅速燃烧,发出明亮的黄色火焰,伴有白色浓烟。稍息,白色NaCl固体
For the first three “chemistry” P82 experiments 2-10 “sodium in the combustion of chlorine”, we made some improvements to achieve the reaction speed, the phenomenon of significant results. The improved experiment does not require heating, chlorine with the system, will not escape and pollute the air. The experimental device is as follows: Experimental Phenomenon: When the yellow-green chlorine into the test tube after a few seconds, that is, the tube of sodium gradually melted, followed by rapid combustion, emitting a bright yellow flame, accompanied by white smoke. Slightly white, solid NaCl