Galvanic cells

purpose

how chemicle energy is converted to electrical energy

How it works

Galvanic (Voltaic) cell consists of two half-cells

a metal electrode placed in a solution of its own ions (e.g., Zn in ZnSO₄ and Cu in CuSO₄).

• The two electrodes are connected by wires, allowing electrons to flow.

which gains and which doesn't

• The more reactive metal (e.g., zinc) loses electrons — it oxidises and acts as the anode.

• The less reactive metal (e.g., copper) gains electrons — it reduces and acts as the cathode.

what it does

1. The flow of electrons from the anode to the cathode generates an electric current, which can power a device like a voltmeter or light bulb.

Function of the Salt Bridge:

allows reaction to continue by balancing the charge in solutions