铜镜在氢气还原氧化铜的实验中,要让学生看得清还原后的“铜镜”,可以这样放置氧化铜粉末,取一个18×150(mm)洁净的试管,从试管底算起四分之一长度的内壁用棉签涂湿。把研得很细的氧化铜粉末放入试管少许,摇动试管使氧化铜末均匀地涂在试管内壁,把未粘紧的氧化铜倒出来,把不需要涂氧化铜的试管其它内壁部分擦干净。然 Copper mirror in hydrogen reduction of copper oxide experiment, let students see the restored “copper mirror”, you can place copper oxide powder, take a 18 × 150 (mm) clean test tube, from the bottom of the test tube count four The inner wall of one length is wetted with a cotton swab. The finely ground copper oxide powder into the test tube a little, shake the test tube so that uniform copper oxide coated the inner wall of the test tube, the non-sticky copper oxide poured out, do not need to apply copper oxide tube other inner wall parts clean . Of course