化学干燥剂有哪几种?
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8\u3001\u786b\u9178\u9499\uff1a\u53ef\u4ee5\u5e72\u71e5H2 \u3002O2 \u3002CO2 \u3002CO \u3001N2 \u3002Cl2\u3001HCl \u3001H2S\u3001 NH3\u3001 CH4\u7b49
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CO \u6d53H2SO4\u3001CaCl2\u3001P2O5 H2S CaCl2
CO2 CaCl2\u3001\u6d53H2SO4\u3001P2O5 N2 \u6d53H2SO4\u3001CaCl2\u3001P2O5
Cl2 CaCl2\u3001\u6d53H2SO4 NH3 CaO\u3001KOH\u6216\u78b1\u77f3\u7070
H2 CaCl2\u3001P NO Ca(NO3)2
HBr CaBr2\u3001ZnBr2 \u3001 O3 CaCl2
HCl CaCl2\u3001\u6d53H2SO4 SO2 \u6d53H2SO4\u3001CaCl2\u3001P2O5
HI CaI2
干燥碱性气体:NaOH,CaO,NaOH与CaO的混合物.
干燥中性气体:H2SO4(浓),P2O5,CaCl2.NaOH,CaO,NaOH与CaO的混合物.
注意:H2SO4(浓)不能干燥还原性气体,如HI,HBr,H2S.
CaCl2不能干燥NH3,C2H5OH.
常用的有生石灰(CaO),浓硫酸,五氧化二磷,碱石灰(固体NaOH和CaO的混合物),
强碱溶液等等
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