Acid-Base Chemistry of AA Flashcards
1
Q
Amphoteric
A
can accept or donate a proton depending on pH
2
Q
Ionizable groups
A
gain protons in acidic conditions and lose them in basic
3
Q
pKa
A
pH at which [HA]=[A-]
4
Q
Carboxyl group pKa
A
~2
5
Q
Amino group pKa
A
~9-10
6
Q
Side chain carboxyl group pKa
A
~4.2
7
Q
Buffer
A
when the pH is not changing despite more base being added
8
Q
When does the solution act as a buffer
A
when the pH=pKa of the solute
9
Q
pI neutral amino acid formula
A
10
Q
pI acidic amino acid formula
A
