celldiagram.worldChemistry · Electrochemical Cell
Voltaic Cell Diagram
A voltaic cell converts the free energy of a spontaneous redox reaction into electrical energy. This is a chemistry cell, not a biological cell.
Interactive vector diagram — click a part, hide labels, or download a 300 DPI PNG / editable SVG.
Diagram labels and functions
| Structure / stage | Function |
|---|---|
| Anode (−) | Oxidation releases electrons. |
| Cathode (+) | Reduction accepts electrons. |
| Salt bridge | Maintains charge balance between half-cells. |
| External wire | Carries electrons from anode to cathode. |
| Electrolytes | Solutions containing reacting ions. |
How a voltaic cell works
Oxidation at the negative anode releases electrons into the wire. They travel to the positive cathode, where reduction consumes them.
Why a salt bridge is needed
Without ion movement, charge would quickly build up and stop electron flow. The salt bridge completes the internal circuit while keeping the half-cell solutions mostly separate.
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Frequently Asked Questions
What is a voltaic cell?
An electrochemical cell that generates electricity from a spontaneous redox reaction.
Which way do electrons flow?
From the anode through the external circuit to the cathode.
Is a voltaic cell the same as a galvanic cell?
Yes. The two names describe the same type of spontaneous electrochemical cell.
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voltaic cell diagram