Extraction Of Metals

9.Match each metal to its extraction method.

10.Arrange the following metals in order of increasing difficulty of extraction (easiest first).

11.In the blast furnace, carbon burns to form carbon dioxide. If 12 g of carbon burns completely, what mass of carbon dioxide is produced? (Ar: C=12, O=16)

12.In the extraction of aluminium, aluminium oxide is dissolved in molten cryolite to lower the melting point and save energy.

13.Gold is found native in the Earth's crust because it is very unreactive.

14.Which of the following metals is extracted by electrolysis?

15.In the extraction of aluminium, aluminium oxide is dissolved in molten cryolite to increase the melting point.

16.What is the purpose of adding limestone to the blast furnace during iron extraction?

17.Arrange the following metals in order of increasing ease of extraction (easiest first).

18.Which equation represents the reduction of iron(III) oxide in the blast furnace?

19.Extraction of a metal from its ore is an oxidation process because oxygen is added.

20.Which of the following are native metals? (Select all that apply)

21.Which of the following are extracted by electrolysis? (Select all that apply)

22.In the blast furnace, carbon monoxide reduces iron(III) oxide to iron.

23.Which of the following metals is found native in the Earth's crust?

24.Which of the following equations represent reactions that occur in the blast furnace? (Select all that apply)

25.Put the following steps in the blast furnace in order from first to last.

26.A company wants to extract a metal from its ore. The metal is above carbon in the reactivity series. Which extraction method should be used?

27.Which of the following are raw materials added to the top of a blast furnace for iron extraction? (Select all that apply)

28.Aluminium is extracted from its ore by heating with carbon.

29.Which of the following metals is likely to be found native (uncombined) in the Earth's crust?

30.In the blast furnace, what is the main reducing agent that converts iron(III) oxide to iron?

31.A metal that is found native in the Earth's crust is likely to be very reactive.

32.In the blast furnace, what is the purpose of adding limestone?

33.Which of the following equations represents the reduction of iron(III) oxide in the blast furnace?

34.Which of the following metals is extracted by heating with carbon or carbon monoxide?

35.Which of the following metals is found native (uncombined) in the Earth's crust?

36.In the blast furnace, the main reducing agent that converts iron(III) oxide to iron is carbon monoxide.

37.A company is extracting a metal from its ore by heating with carbon. Which metal is most likely being extracted?

38.In the blast furnace, which substance is the main reducing agent that converts iron(III) oxide to iron?

39.During the extraction of aluminium, aluminium oxide is dissolved in molten cryolite. What is the main reason for using cryolite?

40.Which of the following metals are found native (uncombined) in the Earth's crust? (Select all that apply)

41.Place the following steps in the blast furnace in the correct order from first to last.

42.In an experiment to extract iron from its ore, a student heats a mixture of iron(III) oxide and carbon powder. Which gas is produced as a result of the reduction reaction?

43.A student is testing a metal ore to determine if it contains a metal that can be extracted by heating with carbon. Which property of the metal is most important to consider?

44.Complete the sentence about extraction of iron.

45.State one raw material added to the top of the blast furnace for iron extraction.

46.Complete the sentences about the extraction of aluminium.

47.In the blast furnace, carbon monoxide reduces iron(III) oxide. Calculate the mass of iron produced when 160 g of iron(III) oxide is completely reduced by excess carbon monoxide. (Ar: Fe=56, O=16)

48.In the blast furnace, iron(III) oxide is reduced by carbon monoxide. Calculate the mass of iron produced when 320 g of iron(III) oxide (Fe₂O₃) is completely reduced. (Ar: Fe=56, O=16)

49.State one reason why cryolite is used in the extraction of aluminium.

50.A blast furnace produces 10,000 tonnes of iron per day. If the furnace operates 365 days a year, how many tonnes of iron does it produce in one year?

51.Complete the sentence.

52.Complete the sentences about the blast furnace.

53.Explain why aluminium is extracted by electrolysis rather than by heating with carbon.

54.Explain why limestone is added to the blast furnace during iron extraction.

55.Explain why limestone is added to the blast furnace during iron extraction. Include the relevant chemical equations.

56.Explain why aluminium is extracted by electrolysis rather than by heating with carbon. Include the relevant position in the reactivity series.

57.In the blast furnace, carbon monoxide reduces iron(III) oxide. Calculate the mass of iron produced when 160 g of iron(III) oxide is completely reduced by excess carbon monoxide. (Ar: Fe=56, O=16)

58.In the blast furnace, iron(III) oxide is reduced by carbon monoxide. Calculate the mass of iron produced when 320 g of iron(III) oxide (Fe₂O₃) is completely reduced. (Ar: Fe=56, O=16)

59.A blast furnace produces 10,000 tonnes of iron per day. If the furnace operates 365 days a year, how many tonnes of iron does it produce in one year?