Standard electrode potential

The standard electrode potential, E^⦵, of a half-cell is the electromotive force measured at 298 K between the half-cell and the standard hydrogen electrode, in which concentration of any reacting species is 1M/gaseous species is at 1 atm.

Remember to indicate the surrounding temperature when drawing half-cells!

The standard cell potential, E^⦵_cell is the maximum potential difference between two half-cells under standard conditions.