试题详情
硫酸工业尾气(主要含SO
2、N
2和O
2),用Na
2SO
3溶液吸收可转化为NaHSO
3 , 当c(HSO
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E3%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E-%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
)∶c(SO
![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E3%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E2%3C%2Fmtext%3E%3Cmtext%3E-%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
)≈10时,吸收能力下降,需要加热再生为Na
2SO
3溶液。已知K
a1(H
2SO
3)=10
-1.9 , K
a2(H
2SO
3)=10
-7.2 , 下列说法
错误的是( )
- A、Na2SO3溶液中存在:c(OH-)= c(H+) + c(HSO
) +2c(H2SO3) - B、Na2SO3溶液吸收SO2的离子方程式为:SO
+SO2+H2O=2HSO![](https://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsubsup%3E%3Cmrow%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E3%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3E-%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
- C、当c(HSO
):c(SO
)=10时,此时吸收液的pH=6.2 - D、与原Na2SO3溶液相比,吸收液充分分解放出SO2再生后吸收SO2能力几乎不变
知识点
参考答案