Amino acids

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Definition of an alpha-amino acid
The COOH and NH2 groups are bonded to the same carbon
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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)
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What is a Zwitterion?
Ions which have a permanent positive and negative charge but which are overall neutral.
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What happens when a zwitterion dissolves in water?
The molecule is ionic and dissolves in polar solvents. The resulting soln is neutral
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What are the characteristics of Glycine and alanine
They are white, crystalline solids with high melting points typical of ionic solids.
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Why do zwitterions have high melting points?
They are dipolar ions with strong attraction between oppositely charged groups.
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Other cards in this set

Card 2

Front

What happens when an amino acid is in solution?

Back

A hydrogen ion transfers from one end of the molecule (COOH) to the other end (NH2)

Card 3

Front

What is a Zwitterion?

Back

Preview of the front of card 3

Card 4

Front

What happens when a zwitterion dissolves in water?

Back

Preview of the front of card 4

Card 5

Front

What are the characteristics of Glycine and alanine

Back

Preview of the front of card 5
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