3. Tables of standard redox potentials

These tables are based on work carried out by IUPAC .

The following equilibria have been ordered in ascending order of potential values (expressed relative to the normal hydrogen electrode).

The temperature considered is 25°C (298 K).

Table 1 concerns acid-stable species (unit activity of the H ⁺ proton, i.e. pH = 0). Table 2 concerns alkaline solutions (unit activity of the OH ion ^– ...