Question

Amino acids show amphoteric behavior. Why?

Answer 1

Hint: A zwitterion also known as an inner salt which is a molecule that carries an identical wide variety of positively and negatively charged determined companies. With amino acids, for example, a chemical equilibrium can be installed between the "numeral" molecule and the zwitterion.

Complete step by step solution:
In aqueous solution, the carboxyl group of an amino acid may lose a proton and the amino group can be given a proton to give it a dipolar ion which is referred to as zwitterion.
Thus, in zwitter ionic form, the amino acid can act in both a way as an acid and as a base.
And, amino acids show amphoteric behavior.

Additional information:
The term ‘Zwitterion’ is at the initial stage derived from the German word ‘zwitter’, which can be unevenly translated as ‘hybrid’ or ‘hermaphrodite’. A zwitterion is an ion which contains two practical actions. In simple words, it's far as ion holding both fine and terrible electric fees. Thus, zwitterions on the whole are electrically neutral (the internet formal price is commonly zero for this molecule).
Zwitterions are every so frequently referred to as “inner salts“. Generally, dipolar compounds aren't categorized as zwitterions. The difference lies in between the truth that the plus and minus signs on the amine oxide represent the formal costs. Zwitterions may be worth medicinal chemistry design concerns during operating with acid, basic or impartial leads.

Note:
A zwitterion is a compound that does not have a combination electric rate, however it does include distinctive undoubtedly and negatively charged sections. The hydrogen ion is excluded from the $ - N{H_3}$ institution in case it improves the $pH$ of an amino acid response by using and adding hydroxide ions.