Redox Calculator
Calculate redox reaction potentials, Gibbs free energy, and equilibrium constants. Balance oxidation-reduction equations.
Select Half-Reactions
Redox Rules:
- - Oxidation: Loss of electrons (increase in oxidation state)
- - Reduction: Gain of electrons (decrease in oxidation state)
- - E cell positive = spontaneous reaction
- - E cell negative = non-spontaneous
Cell Potential (E cell)
2.280 V
Spontaneous Reaction
Cathode E
1.51 V
Anode E
-0.77 V
Delta G
-1099.93 kJ/mol
Equilibrium K
6.41e+192
Formulas:
E cell = E cathode - E anode
Delta G = -nFE
ln K = nFE/RT
About Redox Reactions
Redox (reduction-oxidation) reactions involve the transfer of electrons between species. The oxidizing agent gains electrons (is reduced) while the reducing agent loses electrons (is oxidized). These reactions are fundamental to batteries, corrosion, metabolism, and many industrial processes. The cell potential determines whether a reaction is thermodynamically favorable.