Illustrated Glossary of Organic Chemistry
p
K
a
:
A quantitative measure of
acidity
.
K
a
(the
acid ionization
constant
) is an
equilibrium constant
. For the reaction HA +
H
2
O
A
-
+
H
3
O
+
,
p
K
a
= - log
K
a
Selected p
K
a
Values
Related terms:
Bronsted-Lowry acid
,
Bronsted-Lowry base
,
Lewis acid
,
Lewis base
,
conjugate acid
,
conjugate base
,
p
K
a1
,
p
K
a2
,
p
K
a3
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