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从黄铜中提取纯铜和纯锌的设备及其使用方法与流程 Template






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铜锌原电池（如图）工作时，以下说法正确的是（ ） 电子流动方从Zn﹣灯泡﹣Cu﹣盐桥；Zn电极的质量减轻Cu电极的质量增重；盐桥中的 sketch template
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将纯锌片和纯铜片按图方式插入同浓度的稀硫酸中一段时间以下叙述正确的是 A两烧杯中铜片表面均无气泡产生 B甲中铜片是正极乙中铜片是负极 sketch template
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如图所示的铜 锌原电池中1原电池的电极反应式是正极2H 2e =H2负极Zn =Zn2 2若生成的氢气在标况下的 sketch template