Understanding pKa and Ka
* pKa: The negative logarithm (base 10) of the acid dissociation constant (Ka). It indicates the strength of an acid:
* Lower pKa values mean stronger acids.
* Higher pKa values mean weaker acids.
* Ka: The acid dissociation constant, which measures the extent to which an acid ionizes in solution. A higher Ka value means the acid ionizes more readily.
The Formula
The relationship between pKa and Ka is:
```
Ka = 10^(-pKa)
```
Calculation
1. Substitute the pKa value:
Ka = 10^(-10.26)
2. Calculate:
Ka ≈ 5.5 x 10^(-11)
Therefore, the Ka value for a pKa of 10.26 is approximately 5.5 x 10^(-11).