Glycine, the simplest amino acid, has both an acid group and a basic group in its structure (H,N-CH2-COOH). In aqueous solution it exists predominantly as a self-neutralized species called a zwitterion (H3 Ñ–CH,–CO0"). The zwitterion therefore behaves both as an acid and as a base, according to the equilibria at 25°C: H;N —CH—СОО (аg) + Н,0(€) — H,N-CH2-COO (aq) + H3O* (aq) K, = 1.7 × 10-10 H,N —CH,—СОО (ад) + Н,0() — Н;N—CH, —CООНҢ(ag) + ОН (ад) К, — 2.2 х 1о-12 Calculate the pH of a 0.10 M aqueous solution of glycine at 25°C. (Hint: You may need to take account of the autoionization of water.)

Glycine, the simplest amino acid, has both an acid group and a basic group in its structure (H,N-CH2-COOH). In aqueous solution it exists predominantly as a self-neutralized species called a zwitterion (H3 Ñ–CH,–CO0"). The zwitterion therefore behaves both as an acid and as a base, according to the equilibria at 25°C: H;N —CH—СОО (аg) + Н,0(€) — H,N-CH2-COO (aq) + H3O* (aq) K, = 1.7 × 10-10 H,N —CH,—СОО (ад) + Н,0() — Н;N—CH, —CООНҢ(ag) + ОН (ад) К, — 2.2 х 1о-12 Calculate the pH of a 0.10 M aqueous solution of glycine at 25°C. (Hint: You may need to take account of the autoionization of water.)

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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