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木炭还原氧化铜是初中化学一个重要的演示实验,该反应需要在高温下进行。由于用酒精灯加热产生的温度不很高,从而导致反应速率慢,且生成红色铜的现象不明显。为了提高反应温度,有些做法是用酒精喷灯代替酒精灯加热,有些是在酒精灯火焰上加金属罩,还有用其他方式来提高反应温度的,实验效果虽好,但操作较复杂,而且某些器材在条件较差的学校不易得到,存在一定的局限性。以下实验方法可以降低反应温度要求,简化实验操作,提高反应速率。
Charcoal reduction of copper oxide is an important demonstration of junior high school chemistry experiment, the reaction needs to be carried out at high temperatures. Since the temperature generated by heating with alcohol lamp is not high, the reaction rate is slow, and the phenomenon of producing red copper is not obvious. In order to increase the reaction temperature, some methods are to use alcohol torch instead of alcohol lamp heating, some in the alcohol lamp flame plus metal cover, there are other ways to improve the reaction temperature, the experimental effect is good, but the operation is more complicated, and some Equipment in poor conditions difficult to get the school, there are some limitations. The following experimental methods can reduce the reaction temperature requirements, simplify the experimental operation, improve the reaction rate.