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mu tan huan yuan yang hua tong shi yan gai jin
Author(s): 
Pages: 27-28
Year: Issue:  2
Journal: Experiment and Equipment for Primary School

Abstract: 1 原实验存在问题 义务教育教科书化学九年级上册(人教版)第六单元《碳和碳的氧化物》课题1《金刚石、石墨和和C60》中[实验6-2]木炭还原氧化铜采用如下方法(如图1所示):把刚烘干的木炭粉末和氧化铜粉末混合均匀,小心地铺放进试管,并将试管固定在铁架台上.试管口装有通人澄清石灰水的导管,用酒精灯(可加网罩以使火焰集中并提高温度,最好使用酒精喷灯)加热混合物几分钟.然后先撤出导气管,待试管冷却后再把试管里的粉末倒在纸上,观察现象并分析.
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