下列哪种盐是<b>蓝色的</b>，为什么？CuSO<sub>4</sub>·5H<sub>2</sub>O 或 CuSO<sub>4</sub>。

CuSO<sub>4</sub>·5H<sub>2</sub>O呈蓝色是因为存在结晶水。加热时，它会失去结晶水，变成无水硫酸铜CuSO4，这是一种白色粉末。
 

更新于：2022年10月10日

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