Anode
Definition
An anode is the electrode where oxidation occurs and electrons are given off in a direct-current circuit. It is typically considered the positive terminal in a device like a battery.
5 Must Know Facts For Your Next Test
- In electrochemical cells, the anode is where oxidation occurs.
- The anode is usually marked with a '+' sign in batteries.
- Electrons flow away from the anode toward the cathode in a circuit.
- In galvanic cells, the anode is negatively charged because it releases electrons.
- In electrolytic cells, the anode is positively charged as it attracts negative ions.
Review Questions
- What process occurs at the anode in a direct-current circuit?
- How does electron flow behave relative to the anode in a battery?
- Why might the charge of an anode differ between galvanic and electrolytic cells?
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Subjects (2)
Related terms
Cathode: The electrode where reduction occurs and electrons are gained; often considered the negative terminal in devices like batteries.
Oxidation: A chemical reaction involving the loss of electrons from a substance; occurs at the anode.
Electrolyte: A substance containing free ions that make it electrically conductive, used in batteries to facilitate ion flow between electrodes.
