Standard Reduction Potential Definition

Definition: The standard reduction potential is the potential in volts generated by a reduction half-reaction compared to the standard hydrogen electrode at 25 °C, 1 atm and a concentration of 1 M.

Standard reduction potentials are denoted by the variable E0.

Examples: The reduction of water:

2 H2O + 2 e- → H2 + 2 OH-

has a E0 = 1.776 V

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Helmenstine, Anne Marie, Ph.D. "Standard Reduction Potential Definition." ThoughtCo, Jun. 27, 2014, thoughtco.com/definition-of-standard-reduction-potential-605686. Helmenstine, Anne Marie, Ph.D. (2014, June 27). Standard Reduction Potential Definition. Retrieved from https://www.thoughtco.com/definition-of-standard-reduction-potential-605686 Helmenstine, Anne Marie, Ph.D. "Standard Reduction Potential Definition." ThoughtCo. https://www.thoughtco.com/definition-of-standard-reduction-potential-605686 (accessed May 20, 2018).