Chemistry - Chapter 3 (P1) 0.0 / 5 ? ChemistryExtracting metals /The reactivity seriesRocks, ores, metals and alloysGCSEAQA Created by: rebeccamariaCreated on: 31-03-15 20:51 Where are metals found? Metals are found in the Earth's curst 1 of 21 Give three physical propertites of metals Strong/ conducts heat and electricity/ hard to break/ can be bent hammered into different shapes. 2 of 21 What are most metals combined with? They are mostly combined with oxygen 3 of 21 What is an ore? An ore is a rock which contains enough metal making it economically worthwhile to extract them 4 of 21 Why are some ores concentrated? Give an example. They are concentrated before they are extracted to remove the unwanted rocky material. E.g. copper is concentrated before reduction. 5 of 21 What process purifies the extracted metal? Electrolysis 6 of 21 What is a native metal? Give two examples. A native metal is so unreactive that it is found on the Earth, as the metal themselves. E.g. gold and silver. 7 of 21 What is phytomining? Using plants to absorb metal compounds. 8 of 21 What is bio-leaching? Using bacteria to separate copper from copper sulfide 9 of 21 What is electroysis? Breaking down of a substance using electricity 10 of 21 Why is electrolysis used? Electrolysis is used to extract ores, if they are above carbon in the reactivity series. 11 of 21 What is reduction? Reduction is using carbon to extract metals 12 of 21 Why is reduction used? Reduction is used to extract metals using carbon, if they are below the reactivity series. 13 of 21 What happens when an ore is extracted by reduction? The oxygen is removed from it 14 of 21 Disadvantages of electrolysis 1) It is expensive 2. Uses a lot of energy to extract the ore 15 of 21 Why do we purify metals? To make the impure metal pure 16 of 21 How do we extract iron? We extract iron using reduction 17 of 21 What is the percentage of iron from a blast furnace? 96% 18 of 21 Why is iron extracted from iron ore by reduction with carbon? Iron is less reactive than carbon 19 of 21 Why is aluminium extracted from aluminium ore by electrolysis? Aluminium is more reactive than carbon 20 of 21 What happens to iron oxide in a blast furnace? It is reduced to form iron 21 of 21
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