Chemistry GCSE Edexcel: Electrolysis exam questions and complete correct solutions 2024

What is the cathode? - correct answer Negative electrode What is the anode? - correct answer Positive electrode What is electrolysis? - correct answer Splitting a substance made of ions using electricity What is an electrolyte? - correct answer The substance made of ions that's being broken down in electrolysis. It must always be liquid for electrolysis to work. What is a cation? - correct answer Positive ion which goes to the cathode. What is an anion? - correct answer Negative ion which goes to the anode. What are the products of the electrolysis of aluminium oxide? - correct answer Aluminium, oxygen and carbon dioxide. What substance is the aluminium dissolved in before the electrolysis of aluminium oxide and why? - correct answer Cryolite to lower the boiling point by at least 1000 degrees. What is bauxite? - correct answer An aluminium ore. In the electrolysis of aluminium oxide, why does the anode need to constantly be replaced? - correct answer Because the anode is made of graphite (carbon) which reacts with the oxygen to form carbon dioxide so the anode is eventually worn away What is oxidation? Which electrode does it happen at? - correct answer Loss of electrons. Happens at the anode.