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炼铁的现象及注意事项

更新时间: 2020-08-19 00:00:00     

现象:红色的固体逐渐变为黑色的粉末,澄清石灰水变浑浊,尾气燃烧产生蓝色火焰。

注意事项:有关酒精灯,一氧化碳的先后顺序问题,实验开始时,先通一氧化碳,后点燃酒精灯。结束时,先熄灭酒精灯,后停止通一氧化碳。

关键词: 炼铁 现象 注意 事项

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