The cards Question What is electrolysis? Tap to flip Answer A process that uses electricity to break down a compound (the electrolyte); it is not a physical separation method. Question What is an electrolyte? Tap to flip Answer A liquid or solution that contains freely moving ions. Question What is an electrode? Tap to flip Answer A rod of metal or graphite through which an electric current flows in and out of an electrolyte. Question Which electrode is the cathode, and what happens there? Tap to flip Answer The negative electrode, where positive particles gain electrons. Question Which electrode is the anode, and what happens there? Tap to flip Answer The positive electrode, where negative particles lose electrons. Question Give one scientist whose discoveries were made possible by electrolysis. Tap to flip Answer Davy or Faraday. Question Can a solid ionic compound conduct electricity? Tap to flip Answer No. Question In which state can salts be electrolysed? Tap to flip Answer In the molten (liquid) state. Question What is an anion? Tap to flip Answer A negatively charged ion. Question What is a cation? Tap to flip Answer A positively charged ion. Question Which ions are attracted to the anode during electrolysis? Tap to flip Answer Anions (negatively charged ions). Question Which ions are attracted to the cathode during electrolysis? Tap to flip Answer Cations (positively charged ions). Question When a molten salt is electrolysed, what type of element forms at the positive electrode? Tap to flip Answer A non-metal. Question When a molten salt is electrolysed, what type of element forms at the negative electrode? Tap to flip Answer A metal. Question During electrolysis, what carries the charge through the electrolyte: electrons or ions? Tap to flip Answer Ions; the electrons stay associated with ions and cannot move through the electrolyte. Question Why can aluminium not be extracted using carbon? Tap to flip Answer Aluminium is above carbon in the reactivity series. Question What is bauxite? Tap to flip Answer A sedimentary rock with a high aluminium content. Question Which atoms make up the formula of aluminium oxide? Tap to flip Answer Two aluminium atoms and three oxygen atoms. Question What is the role of cryolite in extracting aluminium? Tap to flip Answer It acts as a solvent, so the electrolysis can take place at a lower temperature. Question Why do the carbon electrodes need replacing continuously when aluminium is extracted? Tap to flip Answer They react with the oxygen produced, forming carbon dioxide. Question Why is electrolysis an expensive process? Tap to flip Answer It requires large amounts of energy. Question What is an aqueous solution? Tap to flip Answer A solution formed when a substance is dissolved in water. Question Which gas may be formed at the cathode when an aqueous solution is electrolysed? Tap to flip Answer Hydrogen. Question What is brine? Tap to flip Answer A concentrated aqueous solution of sodium chloride (between 3.5% and 26% sodium chloride). Question Which four ions are present in brine? Tap to flip Answer H⁺, OH⁻, Na⁺ and Cl⁻. Question In the electrolysis of brine, what is produced at the negative electrode? Tap to flip Answer Hydrogen gas. Question In the electrolysis of brine, what is produced at the positive electrode? Tap to flip Answer Chlorine gas. Question Why does the electrolyte become alkaline during the electrolysis of brine? Tap to flip Answer Sodium hydroxide solution forms in it. Question What are the electrodes made of when copper is purified by electrolysis? Tap to flip Answer Copper. Question When a metal is purified by electrolysis, what must the electrolyte contain? Tap to flip Answer The same ions, in solution, as the metal being purified. Question When copper is purified by electrolysis, what happens to the impurities in the anode? Tap to flip Answer They do not transfer to the cathode, so pure copper is deposited. Question How can the transfer of copper between electrodes be demonstrated? Tap to flip Answer By measuring the change in mass of the copper electrodes. Question What is electroplating? Tap to flip Answer Using electricity to deposit a thin layer of metal onto the surface of another conductive object. Question What does the acronym PANIC stand for in electrolysis? Tap to flip Answer Positive Anode, Negative Is Cathode. Question What is an electric cell? Tap to flip Answer A device containing a store of chemicals that react to produce a voltage across two electrical contacts. Question What does an electric cell made of two different metals in contact with an electrolyte produce? Tap to flip Answer A voltage across the metals. Question What does the size of the voltage across an electric cell depend on? Tap to flip Answer The materials the cell is made from. Question How can electric cells in a battery be connected to produce a larger voltage? Tap to flip Answer In series. Question What happens to the chemical reaction in a rechargeable battery when an external voltage is connected across it? Tap to flip Answer It is reversed. Question In an electric cell, which metal is oxidised? Tap to flip Answer The more reactive metal; it loses electrons, which flow towards the less reactive metal. Question What is a fuel cell? Tap to flip Answer A device that produces a voltage when supplied with a fuel and oxygen. Question In one type of fuel cell, which substance reacts with oxygen from the air to produce a voltage? Tap to flip Answer Hydrogen. Question Give one source of the hydrogen used in fuel cells. Tap to flip Answer Extraction from fossil fuels, or electrolysis powered by the National Grid. Question In a hydrogen fuel cell, at which electrode is hydrogen oxidised? Tap to flip Answer The anode. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Chemistry Unit Electrolysis Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Chemistry lesson by Oak National Academy licensed under Open Government Licence (OGL)
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