Chemistry 0.0 / 5 ? ChemistryMetals, metal ores and alloysGCSEAQA Created by: HollyKellyCreated on: 02-03-15 13:09 Why are alloys likely to be harder than pure metals? Because layers of atoms cannot slide over each other easily. 1 of 6 What is the cathode (negative electrode) made from when copper is purified by electrolysis? The cathode (negative electrode) is made from pure copper when copper is purified by electrolysis. 2 of 6 What is a metal ore? A rock containing a metal, or a metal compound, in high enough concentration to make it economic to extract the metal. 3 of 6 What happens after the metal is concentrated? It is extracted and purified. 4 of 6 Which metals are extracted by electrolysis? potassium sodium calcium magnesium aluminium 5 of 6 How is Iron extracted from its ore? iron oxide + carbon → iron + carbon dioxide 2Fe2O3 + 3C → 4Fe + 3CO2 6 of 6
Comments
No comments have yet been made