This question is about metals. Iron is extracted in a blast furnace by reduction of iron(III) oxide, $$$\mathrm{Fe}_{2} \mathrm{O}_{3}$$$, with carbon monoxide. $$\[ \mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{CO} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_{2} \]$$ Explain how this equation shows that iron(III) oxide is reduced.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_w23_qp_32 Year：2023 Question No：5(b)(i)

Answer:

9.6.1. Describe the ease in obtaining metals from their ores, related to the position of the metal in the reactivity series

9.6.2.1. the burning of carbon (coke) to provide heat and produce carbon dioxide

9.6.2.2. the reduction of carbon dioxide to carbon monoxide

9.6.2.3. the reduction of iron(III) oxide by carbon monoxide

9.6.2.4. the thermal decomposition of calcium carbonate / limestone to produce calcium oxide

9.6.2.5. the formation of slag Symbol equations are not required

9.6.3. State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis

9.6.4.1.

9.6.4.2.

9.6.4.3.

9.6.4.4.

9.6.4.5.

9.6.5.1. the role of cryolite

9.6.5.2. why the carbon anodes need to be regularly replaced

9.6.5.3. the reactions at the electrodes, including ionic half-equations

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