AQA · Chemistry · 8462
GCSE Chemistry: The process of electrolysis
Chemical changes · AQA GCSE Chemistry (8462), specification point 4.4.3.1. Cards are generated from the exam board's own specification for "The process of electrolysis", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is an electrolyte?
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A liquid or solution containing free-moving ions (a melted or dissolved ionic compound) that can conduct electricity.
Why can a molten ionic compound conduct electricity?
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When melted, the ions are free to move about within the liquid and carry charge.
Why can a solid ionic compound not conduct electricity?
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Its ions are fixed in place and cannot move; they only become free to move when the compound is melted or dissolved.
What is the name of the negative electrode in electrolysis?
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The cathode.
What is the name of the positive electrode in electrolysis?
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The anode.
During electrolysis, positively charged ions move to the ?.
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cathode
During electrolysis, negatively charged ions move to the ?.
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anode
Why do positive ions move to the cathode during electrolysis?
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The cathode is the negative electrode, so it attracts positively charged ions (opposite charges attract).
What happens to ions when they reach the electrodes during electrolysis?
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They are discharged, producing elements.
Define electrolysis.
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Passing an electric current through an electrolyte so that ions move to the electrodes and are discharged, producing elements.
What type of equation shows the reaction at one electrode during electrolysis?
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A half equation.
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