Chemistry C1 3.2 Iron and steels. 0.0 / 5 ? ChemistryMetals, metal ores and alloysGCSEAQA Created by: Atlanta and JacobCreated on: 28-04-16 19:13 How is iron oxide used to make iron? Iron oxide is reduced in a blast furnace to make iron. 1 of 17 What is the problem with iron from a blast furnace? It is too brittle for many uses. 2 of 17 What happens to most iron? It is converted into alloys called steels. 3 of 17 What do steels contain? Carefully controlled quantities of carbon and other elements. 4 of 17 What do many of the ores used to produce iron contain? Iron(III) oxide. 5 of 17 How is iron (III) oxide reduced? In high temperatures in a blast furnace using carbon. 6 of 17 How much iron does the iron produced from reducing iron (III) oxide in a blast furnace contain? About 96% iron. 7 of 17 What do the impurities in the iron produced cause? It to be hard and brittle and so it has only a few uses as cast iron. 8 of 17 What happens if all the carbon and other impurities are removed to make pure iron? It is too soft for many uses. 9 of 17 What is most iron used to make? Steels. 10 of 17 What are steels? Steels are alloys of iron because they are mixtures of iron with carbon and other elements. 11 of 17 Why are alloys useful? Alloys can be made so that they have properties for specific uses. 12 of 17 Why are the amounts of carbon and other elements carefully adjusted when making steels? To produce steel with properties required for specific uses. Low-carbon steels are easily shaped and high-carbon steels are hard. 13 of 17 What do some steels, such as stainless steels, contain? Larger quantities of other metals. 14 of 17 What advantage to some steels which contain larger quantities of other metals, such as stainless steels, have? They resist corrosion. 15 of 17 Why does iron from the blast furnace have only a few uses? It is brittle. 16 of 17 Why are steels more useful than pure iron? They are harder, can be made with specific properties, can be made to resist corrosion. 17 of 17
Comments
No comments have yet been made