A 100 ml solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with 1.0M NAOH solution. The pH was monitored. and the results were plotted on a graph, as shown below. The key points in the...

1. What is the possible identity of the AA?

a. Aspartic acid

b. Lysine

c. Alanine

d. Proline

2. What is the isoelectric point of AA?

3. What is the pKa responding to the dissociation of the alpha-carboxylic group?

Extracted text: A 100 ml solution of 0.1 M amino acid (AA) at pH 1.0 was titrated with 1.0M 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. VII 16 PH IV 05 25 Equivalents of OH