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GCSE Chemistry · key term
A conductor through which current enters or leaves an electrolyte.
Used by AQA, Edexcel and OCR
Specification 4.4.3.1, 4.5.2.1 · Paper 1
Revise: Electrolysis PrinciplesTwo electrodes are placed in the electrolyte and connected to an electrical supply. The cathode is the negative electrode, so it attracts positive ions. The anode is the positive electrode, so it attracts negative ions.
A conducting material through which charge enters or leaves an electrolyte; in a simple cell, the electrodes are two different metals.
Specification 1.37, 3.24, 3.29, 5.25C · Paper 1, Paper 2
A conductor through which electric current enters or leaves a substance or device.
Revise: Uses of Graphite and DiamondMoving electrons carry charge, so graphite conducts electricity. That makes it useful for an electrode, which must allow current to flow into or out of a substance or device. Its strong covalent bonds also mean graphite can remain solid at high temperatures.
A conductor through which electric current enters or leaves an electrolyte.
A conductor through which electrical charge enters or leaves a cell.
Specification C3.4d, C6.2p · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A conductor through which charge enters or leaves an electrolyte.
Revise: Electrode ReactionsThe power supply creates two oppositely charged electrodes. The cathode is negative, while the anode is positive. Positive ions, called cations, move towards the cathode; negative ions, called anions, move towards the anode.
A conducting part of a cell through which electrons enter or leave the external circuit.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A conducting material through which charge enters or leaves a chemical cell.
Revise: Chemical cellsA chemical cell uses chemical reactions to produce a potential difference, or voltage, between two electrodes. This potential difference can drive charge through a complete external circuit, transferring energy to a component such as a lamp or motor.
A solid electrical conductor through which current enters or leaves an electrolyte.
A conductor through which electric current enters or leaves an electrolyte.
A conductor through which current enters or leaves an electrolyte; in electrolysis, the anode is positive and the cathode is negative.
When explaining a simple cell, name all three essentials: two different metal electrodes, an electrolyte and a complete external circuit.
For each use, link structure to property to use: mobile electrons → conducts electricity → electrode.
Trace each electrode back to the power supply: the electrode connected to the negative terminal is the cathode, regardless of where it is drawn.
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