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Galvanic Cell
Galvanic Cell
Cell Data
About Galvanic Cells
A galvanic (voltaic) cell converts chemical energy into electrical energy through spontaneous redox reactions. It consists of two half-cells, each containing a metal electrode in a solution of its ions. The more reactive metal (anode) is oxidised, releasing electrons that flow through the external circuit to the less reactive metal (cathode), where reduction occurs.
The salt bridge completes the circuit by allowing ion migration to maintain electrical neutrality in each half-cell. The cell voltage (EMF) is calculated as E°cell = E°cathode − E°anode. A positive E°cell indicates a spontaneous reaction. Standard electrode potentials are measured at 25°C, 1 atm, and 1 mol/L concentrations.