Acidity Flashcards
1
Q
Acids
A
Proton donors
Strength based on how much it dissociates in water
Strength determined on stability of conjugate base
2
Q
Ka
A
HA + H2O – A- + H3O+
Ka= [H3O+] [A-]
[HA]
3
Q
pKa
A
-log10Ka
4
Q
What happens when pH=pKa
A
50% ionisation
5
Q
pKa < 7
A
Most molecules will be ionised
6
Q
Phenols
A
OH attached to benzene ring
Weak acid
pKa - 10
