Standard cell EMF from half-cell potentials (E°cell = E°cathode − E°anode (both as reduction potentials))
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E°cell = E°cathode − E°anode (both as reduction potentials)
What each symbol means
| Symbol | What it stands for |
|---|---|
| E^\circ_{\mathrm{cell}} | Standard EMF of the cell (V) |
| E^\circ_{\mathrm{anode}} | Standard reduction potential of anode half-cell (V) |
| E^\circ_{\mathrm{cathode}} | Standard reduction potential of cathode half-cell (V) |
When to use this
298 K, 1 bar, unit activities (1 M for aqueous ions). Both half-potentials must be written as reduction: oxidised form + ne⁻ → reduced form.