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烧开的水一层絮状物

更新时间: 2021-03-21 09:52:51     

1、烧开的水有一层絮状物是水垢。

2、水是有硬度的,而水的硬度主要是由钙、镁离子形成的,并且按其所含可溶性盐类组成可以分为暂时硬度和永久硬度两类,水在加沸时有白色沉淀析出,沉于水底的是水的钙、镁离子受热分解生成碳酸镁,这就是水垢。

关键词: 状物

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