Glycine hydrochloride (CI¯H3N*CH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. a. Which proton would you expect to dissociate at a lower pH, the proton of the carboxylic acid group or the ammonium group? b. Write the chemical equations describing the dissociation of the first and second protons of CI¯H3N*CH2COOH. c. A solution containing 0.01 M CI-H3N*CH2COOH and 0.02 M of the mono- dissociated species has pH = 2.65. What is the pKa of this dissociation? d. Sketch the titration curve of this diprotic acid.

Glycine hydrochloride (CI¯H3NCH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. a. Which proton would you expect to dissociate at a lower pH, the proton of the carboxylic acid group or the ammonium group? b. Write the chemical equations describing the dissociation of the first and second protons of CI¯H3NCH2COOH. c. A solution containing 0.01 M CI-H3N*CH2COOH and 0.02 M of the mono- dissociated species has pH = 2.65. What is the pKa of this dissociation? d. Sketch the titration curve of this diprotic acid.

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Answer the problem in the image. Please show the solution.

Glycine hydrochloride (CI¯H3N*CH2COOH) is a diprotic acid that contains a carboxylic
acid group and an ammonium group and is therefore called an amino acid. It is often used
in biochemical buffers.
a. Which proton would you expect to dissociate at a lower pH, the proton of the
carboxylic acid group or the ammonium group?
b. Write the chemical equations describing the dissociation of the first and second
protons of Cl-H3N*CH2COOH.
c. A solution containing 0.01 M CI¯H3N*CH2COOH and 0.02 M of the mono-
dissociated species has pH = 2.65. What is the pKa of this dissociation?
d. Sketch the titration curve of this diprotic acid.

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