Standard Electrode Potential
What is Standard Electrode Potential?
The standard electrode potential (E°) is the potential of a half-cell measured relative to the standard hydrogen electrode (SHE = 0 V) under standard conditions (1 M solution, 298 K, 1 atm). Positive E° indicates a tendency to be reduced (oxidising agent); negative E° indicates a tendency to be oxidised (reducing agent). Standard electrode potentials are used to predict spontaneity of redox reactions and to calculate standard cell voltages.
Key Facts
Frequently Asked Questions
The standard electrode potential (E°) is the potential of a half-cell measured relative to the standard hydrogen electrode (SHE = 0 V) under standard conditions (1 M solution, 298 K, 1 atm). Positive E° indicates a tendency to be reduced (oxidising agent); negative E° indicates a tendency to be oxidised (reducing agent). Standard electrode potentials are used to predict spontaneity of redox reactions and to calculate standard cell voltages.