A zwitter ion is an inner salt of amphoteric compound resulting due to the reaction between acidic and basic groups. Amino acids and proteins constitute both acidic (-COOH ) and alkaline (-NH2) groups, as a result they can form salts with acid and alkali. When dissolved in either acid or alkali, they behave like anions and cations, migrating to either cathod or anode. However, at a definite pH, called isoelectric pH, they form inner salt or zwitter ions, at which they are least soluble and electrically neutral.
Tags Acid or alkali Acidic (-COOH ) and alkaline (-NH2) groups Amino acids and proteins Definite pH Electrically neutral Inner salt of amphoteric compound Inner salt or zwitter ions Isoelectric pH Least soluble Reaction between acidic and basic groups Salts with acid and alkali Zwitter ion