3. Glycine is a diprotic acid that can undergo two dissociation reactions, one for the a-amino group and the other for the carboxyl group. Therefore, it has two pKa values. The carboxyl group has a pKa1 of 2.34 and the a-amino group has a pKa2 of 9.60. Glycine can exist in fully deprotonated, fully protonated or zwitterionic form. 天 H H H H H H H ΝΘ он он H C-H H- -H H-C-H H O-H ion at low pH zwitterion neutral pH ion at high pH Determine the concentrations of glycine's different protonated forms at a. pH 2.0 b. pH 5.0 c. pH 12.0
3. Glycine is a diprotic acid that can undergo two dissociation reactions, one for the a-amino group and the other for the carboxyl group. Therefore, it has two pKa values. The carboxyl group has a pKa1 of 2.34 and the a-amino group has a pKa2 of 9.60. Glycine can exist in fully deprotonated, fully protonated or zwitterionic form. 天 H H H H H H H ΝΘ он он H C-H H- -H H-C-H H O-H ion at low pH zwitterion neutral pH ion at high pH Determine the concentrations of glycine's different protonated forms at a. pH 2.0 b. pH 5.0 c. pH 12.0
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter22: Organic And Biological Molecules
Section: Chapter Questions
Problem 10RQ
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Please correct answer and don't used hand raiting
Transcribed Image Text:3. Glycine is a diprotic acid that can undergo two dissociation reactions, one for the a-amino group and
the other for the carboxyl group. Therefore, it has two pKa values. The carboxyl group has a pKa1 of
2.34 and the a-amino group has a pKa2 of 9.60. Glycine can exist in fully deprotonated, fully protonated
or zwitterionic form.
天
H
H
H
H
H
H
H
ΝΘ
он
он
H
C-H
H-
-H
H-C-H
H
O-H
ion at low pH
zwitterion
neutral pH
ion at high pH
Determine the concentrations of glycine's different protonated forms at
a. pH 2.0
b. pH 5.0
c. pH 12.0
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