初中化学中要求掌握三个还原CuO的实验，即H2、CO自C还原CuO实验。这三个实验在反应原理、装置、操作几方面既有相同处又有不同处，现将它们的异同点列表比较如下：说明：①这是为了防止反应中生成的水与反应物中的湿存水因加热蒸发并在管目凝成水而倒流试管加热处石D起试管破 The junior high school chemistry is required to master three experiments of reducing CuO, namely H2, CO reduction of CuO from C experiment. These three experiments have similarities and differences in the aspects of reaction principle, device, and operation. The comparison of similarities and differences between them is as follows: Note: 1 This is to prevent the formation of water in the reaction and the wetness in the reactants. The water evaporates due to heating and condenses into water at the inlet of the test tube.