Amino acids 0.0 / 5 ? ChemistryAcids, bases and saltsA2/A-levelCCEA Created by: MCahoon665Created on: 10-06-19 15:05 Definition of an alpha-amino acid The COOH and NH2 groups are bonded to the same carbon 1 of 6 What happens when an amino acid is in solution? A hydrogen ion transfers from one end of the molecule (COOH) to the other end (NH2) 2 of 6 What is a Zwitterion? Ions which have a permanent positive and negative charge but which are overall neutral. 3 of 6 What happens when a zwitterion dissolves in water? The molecule is ionic and dissolves in polar solvents. The resulting soln is neutral 4 of 6 What are the characteristics of Glycine and alanine They are white, crystalline solids with high melting points typical of ionic solids. 5 of 6 Why do zwitterions have high melting points? They are dipolar ions with strong attraction between oppositely charged groups. 6 of 6
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