Standard Reduction Potential (Definition)

The standard reduction potential is the potential in volts generated by a reduction half-reaction compared to the standard hydrogen electrode at 25 Â °C, 1 atm and a concentration of 1 M. The standard reduction potential is defined relative to a standard hydrogen electrode, which is assigned the potential 0.00 V.Standard reduction potentials are denoted by the variable E0. Example The reduction of water:2 H2O 2 e- → H2 2 OH-has a E0 1.776 V Source Stumm, W.; Morgan, J. J. (1981). Aquatic Chemistry (2nd ed.). John Wiley Sons, New York.