IGCSE Chemistry Revision Notes Extraction of metals

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Syllabus Objectives

IGCSE: Metals

Sub Topic:9.6 Extraction of metals

Syllabus Objectives:

CORE:

Describe the ease in obtaining metals from their ores, related to the position of the metal in the reactivity series
Describe the extraction of iron from hematite in the blast furnace, limited to:
(a) the burning of carbon (coke) to provide heat and produce carbon dioxide
(b) the reduction of carbon dioxide to carbon monoxide
(c) the reduction of iron(III) oxide by carbon monoxide
(d) the thermal decomposition of calcium carbonate /limestone to produce calcium oxide
(e) the formation of slag Symbol equations are not required
State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis

EXTENDED

State the symbol equations for the extraction of iron from hematite
(a) C + O₂ -> CO₂
(b) C + CO2 ->2CO
(c) Fe₂O₃ + 3CO -> 2Fe + 3CO₂
(d) CaCO₃ -> CaO + CO₂
(e) CaO + SiO₂? CaSiO₃
Describe the extraction of aluminium from purified bauxite / aluminium oxide, including:
(a) the role of cryolite
(b) why the carbon anodes need to be regularly replaced
(c) the reactions at the electrodes, including ionic half-equations Details of the purification of bauxite are not required

Revision Notes

IGCSE Chemistry Revision Notes Extraction of metals

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