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玻璃杯里的發电站我们面前的一個玻璃杯里,盛着淡蓝色的硫酸铜溶液。我们給它投進一小塊锌。过了一会,锌塊复上了一層暗色的銅,而溶液里就出现了锌離
The power station in the glass contained a light blue copper sulfate solution in a glass in front of us. We dropped a small piece of zinc into it. After a while, the zinc block reappears a dark layer of copper, and zinc is found in the solution.