某小组为了探究不同离子与OH
-反应的先后相关问题,分别在1L0.1mol•L
-1NH
4HCO
3溶液、1L0.1mol•L
-1NH
4HSO
3溶液中加一定量NaOH固体后并恢复到常温(体积变化忽略不计),并测得其中相关粒子浓度变化情况分别如图1、图2所示[已知:K
a1(H
2CO
3)=4.3×10
-7 , K
a2(H
2CO
3)=5.61×10
-11 , K
a1(H
2SO
3)=1.52×10
-2 , K
a2(H
2SO
3)=1.02×10
-7 , K
b(NH
3•H
2O)=1.75×10
-5],下列说法正确的是
![](http://tikupic.21cnjy.com/2023/03/14/be/42/be42cf9adfba5ee53e61293d3eb6b4bf_225x199.png)
图11L0.1mol•L-1NH4HCO3溶液中加入一定量NaOH后各粒子浓度变化曲线
![](http://tikupic.21cnjy.com/2023/03/14/c5/51/c5517c22cd968d4108f710345a49ea84_217x190.png)
图21L0.1mol•L-1NH4HSO3溶液中加入一定量NaOH后各粒子浓度变化曲线
- A、由上述实验可知与OH-反应的先后顺序为HSO
>NH
>HCO![](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%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
- B、图1中,当n(NaOH)=0.05mol时,只发生反应OH-+NH
=NH3•H2O - C、图2中,当n(NaOH)<0.1mol时,主要发生反应HSO
+OH-=H2O+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%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
- D、上述实验说明,离子反应的先后顺序与反应平衡常数大小无关