归纳下高中化学气体的密度(和水比较)还有水溶性

如题。。。不胜感激。。。。。
2025-03-16 03:11:58
推荐回答(3个)
回答1:

密度可以通过相对分子质量来比较,相同状态下的气体密度比等于相对分子质量之比,空气的平均相对分子质量是29
O2,H2,N2,CO,烃类不溶于水
H2S 1体积水能溶解2.6体积的硫化氢
SO2 1体积水能溶解40体积的二氧化硫
HCl 1体积水能溶解500体积的氯化氢
NH3 1体积水能溶解700体积的氨
CO2 1体积水能溶解1体积的二氧化碳
Cl2 1体积水能溶解2体积的氯气
HCHO 易溶于水,水溶液浓度最高可达55%
此外,卤化氢都易溶于水

回答2:

1.气体与空气比较时,看气体的摩尔质量,若大于空气的29g/mol就是密度比空气大,反之比空气小。
2.气体的水溶性主要有以下几个
nh3
1:700
hcl
1:500
so2
1:40
h2s
1:2.6
cl2
1:2
co2
1:1
其他的有限定范围吗?例如无机物还是有机物等等??

回答3:

密度都比水小……
极难溶(不溶):CH4,C2H4
难溶(微溶):N2、NO、H2、C2H2、CO、O2
可溶:NO2、CO2、SO2、Cl2
易溶:HCl、H2S
极易溶:NH3

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