甲烷燃烧生成的CO2﹑CO和水蒸汽,缓慢通过无水CaCl2,CaCl2增重了。反应式为何?根据题意,氯化钙只与...

2025-03-25 07:15:35
推荐回答(4个)
回答1:

就是一个物理的吸水没有反应式,硬要的话就是nH2O+CaCl2~CaCl2*nH2O。CO2只与水反应生成碳酸根离子,碳酸根离子再与离子状态的钙离子反应。因为该体系是气相体系,水蒸气不能使解离得出钙离子。所以不能反应。机理

回答2:

氯化钙吸水没有发生反应。没有方程式。

如果反应CaCl2+CO2+H2O===CaCO3+2HCl 显然这个反应是错误的,只能逆向进行。
熟石灰Ca(OH)2可以和CO2反应的。
Ca(OH)2+CO2==CaCO3+H2O

回答3:

结合成六水氯化钙:CaCl2+6H2O==CaCl2·6H2O
氯化钙假如和二氧化碳、水(碳酸)反应,生成碳酸钙和盐酸。但是我们知道碳酸钙溶解于盐酸,生成氯化钙、水、二氧化碳,所以实际上不会反应。

回答4:

此反应中一摩尔CaCl2结合了几摩尔的水是不知道的但一般写成八水合氯化钙( CaCl2'8H2O), 这些特殊反应一般要记住,考试就爱考特殊反应

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