初中化学里接触到的可以做干燥剂的物质都有哪些

2025-01-28 07:48:25
推荐回答(5个)
回答1:

酸性干燥剂(如浓硫酸等)
碱性干燥剂(如生石灰、碱石灰等)
中性干燥剂(如CaCl2等)
气体分为
酸性气体(如CO2、SO2、等)
碱性气体(如NH3等)
中性气体(H2、O2、CO等)
根据酸与碱反应中各反应的原理
酸与碱不能共存
①即酸性干燥剂(如浓硫酸等)不能干燥碱性气体(如NH3等)反应生成硫酸铵,但能干燥酸性和中性气体
②碱性干燥剂(如生石灰、碱石灰等)不能干燥酸性气体(如CO2、SO2、等),但能干燥碱性和中性气体
③中性干燥剂(如CaCl2等)一般能干燥绝大多数气体

回答2:

您好,初中接触的干燥剂主要有
1.
生石灰(cao)与水反应,生成ca(oh)2
2.
硫酸(h2so4)吸水性
3.
苛性钠(naoh)吸水性
4.
碱石灰(naoh与cao混合物)
一般遇到的就这些,望采纳。

回答3:

碱石灰,固体氢氧化钙,生石灰,浓硫酸。
还有氯化钙,不过一般不考。
望采纳,谢谢!

回答4:

您好,初中接触的干燥剂主要有
1.
生石灰(CaO)与水反应,生成Ca(OH)2
2.
硫酸(H2SO4)吸水性
3.
苛性钠(NaOH)吸水性
4.
碱石灰(NaOH与CaO混合物)
一般遇到的就这些,望采纳。

回答5:

生活中的干燥剂有哪些

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