carbon extract by reaction with carbon or carbon zinc monoxide iron tin lead hydrogen extracted in various ways copper silver gold platinum The method of extraction of a metal from its ore depends on the metal's position in the reactivity series. Gold, because it is so unreactive, is found as the native metal and not as a compound. It does not need to be chemically extracted from its ore, but chemical reactions may be needed to remove other elements that might contaminate the metal. Metals are extracted from ores. An ore is a rock that contains enough of a mineral (metal compound) for the metal to be extracted from it. Most metals are extracted from an ore by reduction with carbon or by electrolysis. Extraction using carbon Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal. The metal oxide loses oxygen, and is therefore reduced. The carbon gains oxygen, and is therefore oxidised. Using iron as an example: iron oxide + carbon iron + carbon dioxide → 2Fe2O3(s) + 3C(s) 4Fe(l) + 3CO2(g) → The source of carbon for this reduction is coke, obtained by heating coal in the absence of oxygen. Note that the iron is liquid when it is formed, due to the very high temperature at which the reaction takes place. Some metals, such as aluminium, are so reactive that oxides cannot be reduced by carbon. What is electrolysis? Ionic substances contain charged particles called ions. For example, lead bromide contains positively charged lead ions and negatively charged bromide ions.
carbon zinc iron tin lead extract by reaction with carbon or carbon monoxide hydrogen copper silver gold platinum extracted in various ways The method of extraction of a metal from its ore depends on the metal's position in the reactivity series. Gold, because it is so unreactive, is found as the native metal and not as a compound. It does not need to be chemically extracted from its ore, but chemical reactions may be needed to remove other elements that might contaminate the metal. Metals are extracted from ores. An ore is a rock that contains enough of a mineral (metal compound) for the metal to be extracted from it. Most metals are extracted from an ore by reduction with carbon or by electrolysis. Extraction using carbon Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal. The metal oxide loses oxygen, and is therefore reduced. The carbon gains oxygen, and is therefore oxidised. Using iron as an example: iron oxide + carbon → iron + carbon dioxide 2Fe2O3(s) + 3C(s) → 4Fe(l) + 3CO2(g) The source of carbon for this reduction is coke, obtained by heating coal in the absence of oxygen. Note that the iron is liquid when it is formed, due to the very high temperature at which the reaction takes place. Some metals, such as aluminium, are so reactive that oxides cannot be reduced by carbon. What is electrolysis? Ionic substances contain charged particles called ions. For example, lead bromide contains positively charged lead ions and negatively charged bromide ions.