Dissociation constant
In chemistry and biochemistry the dissociation constant, abbreviated Kd, is a measure of the extent to which a dissociation reaction
proceeds at equilibrium.
It is given quantitatively by the expression
Where [A], [B], and [AB] indicate the concentrations of A, B, and AB, respectively.
See also hydrogen bond.
The dissociation constant is a specific type of equilibrium constant[?].
The dissociation constant of water (Ke) varies in function of the temperature. The value of pH for neutrality is not the same at different temperatures.
water
Ke
pKe
0°C
0.1e-14
14.92
10°C
0.3
14.52
18°C
0.7
14.16
25°C
1.2
13.92
30°C
1.8
13.75
50°C
8
13.10
60°C
12.6
12.90
70°C
21.2
12.67
80°C
35
12.46
90°C
53
12.28
100°C
73
12.14