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 –: pH = 14).
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Tables of standard redox potentials