Question

Comment on the Titration Curves of Amino Acids.

Answer 1

Titration Curves of Amino Acids:-

• Titration reactions are primarily carried out on the basis of the concentration of acidic and basic radicals.
• The acidic radicals i.e., protons are removed by the basic radicals i.e., hydroxide ions.
• Amino acids have both acidic as well as basic groups. The acidic group includes- Carboxylic acid and the basic group includes the Amino group.
• The acidic and basic groups interact with each other by the transference of a proton.
• the carboxylic acid group present in the amino acid releases a proton and this proton is accepted by the amino group present on the same amino acid.
• The carboxylic acid group after losing a proton attains a $(-)\mathrm{ve}$ charge, and the amino group after accepting a proton attains a $(+)\mathrm{ve}$ charge.
• Thus a single molecule has both the charges present on it. Such ion is called a zwitterion.
• The acid-base titration curve shifts upon the addition of acid or base.