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E° of Cathode (Reduction)

E° of Anode (Reduction)

Standard Cell Potential (E°cell)

1.10 V

Standard Cell Potential (E°cell) vs E° of Cathode (Reduction)

सूत्र

E°cell = E°cathode − E°anode

Where:

E°cell = standard cell potential (V)

E°cathode = standard reduction potential of the cathode

E°anode = standard reduction potential of the anode

Both values are entered as standard reduction potentials. The anode undergoes oxidation, so its reduction potential is subtracted.

Positive E°cell means the reaction is spontaneous (galvanic cell).

A Cu/Zn galvanic cell: Cu²⁺/Cu E° = +0.34 V (cathode), Zn²⁺/Zn E° = -0.76 V (anode).

What does a positive E°cell mean?

A positive E°cell indicates a spontaneous reaction (ΔG° < 0). This is a galvanic (voltaic) cell that can produce electricity.

How do I identify cathode and anode?

The half-cell with the higher reduction potential is the cathode (reduction occurs). The lower one is the anode (oxidation occurs).

How is E°cell related to ΔG°?

ΔG° = -nFE°cell, where n is moles of electrons transferred and F = 96485 C/mol is Faraday's constant.

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