Active electrodes
Definition
Active electrodes are the electrodes in an electrochemical cell where the redox reactions occur. They participate directly in the chemical reactions by either gaining or losing electrons.
5 Must Know Facts For Your Next Test
- Active electrodes undergo oxidation or reduction during the operation of the cell.
- The material of active electrodes changes as they take part in the electrochemical reactions.
- In a Galvanic cell, one electrode serves as the anode (oxidation) and the other as the cathode (reduction).
- Active electrodes can be made from metals, non-metals, or composite materials depending on their reactivity and stability.
- The potential difference between active electrodes drives the flow of electrons through an external circuit.
Review Questions
- What role do active electrodes play in a Galvanic cell?
- How does the material composition of active electrodes change during electrochemical reactions?
- Why is it important to have different materials for anodes and cathodes in a Galvanic cell?
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Related terms
Anode: The electrode where oxidation occurs, resulting in a loss of electrons.
Cathode: The electrode where reduction occurs, leading to a gain of electrons.
Redox Reactions: \text{Chemical reactions that involve the transfer of electrons between two species.}
