pKa values Flashcards
1
Q
A stronger acid has a ? pka?
A better leaving group has a ? pKaH?
A
Stronger acid → lower pH → higher Ka → lower pKa
Lower pKaH → leaving group has a stronger conjugate acid → better leaving group
The pKaH is the pKa of the leaving group’s conjugate acid. So an acid’s pKa = its base’s pKaH.
2
Q
for all following acids and pka values, remember that the pka of acid = pkah of conjugate base
A
3
Q
HI
A
-10
4
Q
HCl
A
-7
5
Q
H2SO4
A
-3
6
Q
H3O+
A
-1.7
7
Q
HSO4-
A
2
8
Q
carb acids
A
~5
9
Q
H2S
A
7
10
Q
HCN
A
9.1
11
Q
NH4+
A
9.2
12
Q
phenol
A
10
13
Q
H2O
A
15.7
14
Q
ethanol
A
15.9
15
Q
ketones
A
~20
