Extracting metals from ores The least reactive metals are the easiest to extract, the most reactive metals are hardest to extract. Extracting gold and silver • These two elements are found in nature in their pure forms. So there is no need to prurify them. You can even find them in stream beds by using a pan. • Metals like iron and copper are found in oxide forms and purified by using more reactive elements. For these elements, carbon is used. Iron oxide+ carbon iron+ carbon dioxide Copper oxide+ carbon carbon dioxide + copper. Zinc oxide +carbon zinc + carbon dioxide • Lead is found in nature as lead sulphide. We need to use two processes. Lead sulphide+ oxygen lead oxide + sulphur dioxide Lead oxide+ carbon carbon dioxide+ lead. Aluminium and group 1 and group 2 elements are more reactive than carbon, therefore they cannot purified by using carbon. Instead electrolysis is used to purify them. Magnesium, calcium, sodium, potassium and aluminium belongs to this group. Electrolysis is simply passing an electricity from the solution of the metal. Example: generally there are two ways of extracting metals. One way is heating with carbon and the other way is Electrolysis. Write which method we need to use to extract aluminium and write the reason for that. Ex: metal oxide + carbon carbon dioxide + metal Reduction with carbon means heating together with carbon.