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怎么区分石灰和石膏
更新时间： 2020-11-02 00:00:00  

石膏是水合硫酸钙，熟石膏是无水硫酸钙2CaSO4·H2O，呈中性。生石灰是氧化钙CaO，遇水生成氢氧化钙,熟石灰是氢氧化钙Ca(OH)2，呈碱性，滴酚酞液呈红色。石灰一种以氧化钙为主要成分的气硬性无机胶凝材料。石灰是用石灰石、白云石、白垩、贝壳等碳酸钙含量高的产物，经900~1100℃煅烧而成。石灰是人类最早应用的胶凝材料。

关键词： 怎么 区分 石灰 石膏

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