This definitions covers Key Definitions within Electrolysis of Aluminium for GCSE Chemistry. Revise Electrolysis of Aluminium in Electrolysis for GCSE Chemistry with 20 exam-style questions and 0 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 6 of 12 in this topic. Make sure you can use the exact wording confidently, because definition marks are often lost through vague language.
Topic position
Section 6 of 12
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20 questions
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0 flashcards
📖 Key Definitions
Electrolysis: The decomposition of an ionic compound (when molten or in solution) using electrical energy to break down the compound into its elements.
Electrolyte: The ionic compound that is dissolved or melted to allow electrolysis to occur; it conducts electricity because its ions are free to move.
Cathode: The negative electrode in electrolysis; positive ions (cations) are attracted here and gain electrons (reduction occurs).
Anode: The positive electrode in electrolysis; negative ions (anions) are attracted here and lose electrons (oxidation occurs).
Cryolite: Sodium aluminium fluoride (Na₃AlF₆), used as a solvent for aluminium oxide in the Hall-Héroult process; it lowers the operating temperature from 2072°C to ~950°C.
Bauxite: The ore from which aluminium is obtained; it contains aluminium oxide (Al₂O₃) along with impurities.