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1问题的提出铝置换铜离子的反应是高中化学实验中重要的学生实验。在实验中,往往要先用氢氧化钠溶液或盐酸溶液除去铝片表面的氧化膜以加快置换反应的进行,但在实际操作中效果并不十分明显。在一次实验中我们将未经清洗的刚用盐酸溶液除去表面氧化膜的铝片直接放入盛有硫酸铜溶
1 The problem of the proposed replacement of copper ions by aluminum is an important student experiment in high school chemistry experiments. In the experiment, the oxide film on the surface of the aluminum sheet is often removed with a sodium hydroxide solution or a hydrochloric acid solution to accelerate the displacement reaction, but the effect is not very obvious in actual operation. In one experiment, we placed uncleaned aluminum flakes immediately removed with a hydrochloric acid solution into a cupric sulfate solution.