Question
Sun August 12, 2012 By:
 

define zwitter ion(explain)

Expert Reply
Sun August 12, 2012
A molecule or ion having separate positively and negatively charged groups.

Amino acids are the best-known examples of zwitterions. These compounds contain an ammonium and a carboxylate group, and can be viewed as arising via a kind of intramolecular acid-base reaction: The amine group deprotonates the carboxylic acid.

NH2RCHCO2 NH3+RCHCO2–  zwitter ion
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