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Amino acids are amphoteric in nature. Ex...

Amino acids are amphoteric in nature. Explain.

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At aqueous solution, the proton from carboxyl group can be transferred to the amino group of an amino acid leaving these groups with opposite charges. Despite having both positive and negative charges, this molecule is neutral and has amphoteric behaviour. These ions are called zwitter ions.

Zwitter ions behave as neutral molecules at pH isoelectric point.
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