Standard electrode potential (data page)

• A temperature of.
• An effective concentration of 1 mol/L for each aqueous species or a species in a mercury amalgam.
• A partial pressure of 101.325 kPa for each gaseous reagent. This pressure is used because most literature data are still given for this value rather than for the current standard of 100 kPa.
• An activity of unity for each pure solid, pure liquid, or for water. The relation in electrode potential of metals in saltwater is given in the galvanic series.
• Although many of the half cells are written for multiple-electron transfers, the tabulated potentials are for a single-electron transfer. All of the reactions should be divided by the stoichiometric coefficient for the electron to get the corresponding corrected reaction equation. For example, the equation Fe + 2 Fe means that it requires 2 × 0.44 eV = 0.88 eV of energy to be absorbed in order to create one neutral atom of Fe from one Fe ion and two electrons, or 0.44 eV per electron, which is 0.44 J/C of electrons, which is 0.44 V.
• After dividing by the number of electrons, the standard potential E is related to the standard Gibbs free energy of formation ΔG by:
• Note that the table may lack consistency due to data from different sources. For example: