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A 100 mL solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated I to VII.

A 100 mL solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated I to VII.

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Choices for each item:

1. (A) Lysine (B) Aspartic Acid (C) Alanine (D) Proline

2. I, II, III, IV, V, VI, VII

3. (A) 9.00 (B) 10.50 (C) 2.10 (D) 6.00

4. I, II, III, IV, V, VI, VII

5. (A) 5.00 - 7.00

    (B) 1.00 - 3.00

    (C) 10.50 - 12.50

    (D) 8.00 - 10.00

6. I, II, III, IV, V, VI, VII

A 100 ml solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated I to VII. 14 12 VII 10 VI IV pH 6 III 2 II 0.5 1.5 2 2.5 Equivalents of OH
Transcribed Image Text:A 100 ml solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with NaOH solution. The pH was monitored, and the results were plotted on a graph, as shown below. The key points in the titration are designated I to VII. 14 12 VII 10 VI IV pH 6 III 2 II 0.5 1.5 2 2.5 Equivalents of OH
1. What is the possible identity of the amino acid? [Select ] 2. What is the isoelectric point of AA? [Select ] 3. What is the pka corresponding to the deprotonation of the alpha-amino group? [ Select ] 4. Region/point where AA is predominantly present as a (+1)-charged species. [ Select] 5. The effective buffering range for the amino acid in the basic region. [ Select ] 6. Region/point where the solution has a 50:50 percent mixture of the (0) and the (+1) species. ( Select]
Transcribed Image Text:1. What is the possible identity of the amino acid? [Select ] 2. What is the isoelectric point of AA? [Select ] 3. What is the pka corresponding to the deprotonation of the alpha-amino group? [ Select ] 4. Region/point where AA is predominantly present as a (+1)-charged species. [ Select] 5. The effective buffering range for the amino acid in the basic region. [ Select ] 6. Region/point where the solution has a 50:50 percent mixture of the (0) and the (+1) species. ( Select]
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