甘氨酸盐酸盐(HOOCCH
2NH
3Cl)的水溶液呈酸性,溶液中存在以下平衡:
HOOCCH2NH![](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%2B%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
-OOCCH2NH
+H+ K1
-OOCCH2NH![](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%2B%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmsubsup%3E%3C%2Fmath%3E)
-OOCCH2NH2+H+ K2
常温时,向10mL一定浓度的HOOCCH2NH3Cl的水溶液中滴入同浓度的NaOH溶液。混合溶液pH随加入NaOH溶液体积的变化如图所示。下列说法错误的是( )
![](http://tikupic.21cnjy.com/2022/05/09/71/5f/715f5bbee28f72708d0d2883fd436c63_162x147.png)
- A、Q→X过程中:
逐渐减小 - B、X点的溶液中:c(-OOCCH2NH2)>c(HOOCCH2NH
) - C、P点的溶液中:c(HOOCCH2NH
)+c(H+)=c(-OOCCH2NH2)+c(OH-) - D、当V(NaOH)=20mL时,混合溶液中的溶质主要为NaOOCCH2NH2和NaCl