1.1. Separate: Chemistry and Extended Only 

Aluminium and iron are extracted from their ores by different methods.

Aluminium is extracted from its purified oxide ore by electrolysis.

What is the name of the ore of aluminium which consists mainly of aluminium oxide?

1.2. Separate: Chemistry and Extended Only

The electrodes are both made of the same substance.

Name this substance.

1.3. Separate: Chemistry and Extended Only

Aluminium oxide is dissolved in molten cryolite before it is electrolysed.

Give two reasons why aluminium oxide dissolved in molten cryolite is electrolysed rather than molten aluminium oxide alone.

1.4. Separate: Chemistry and Extended Only

Write the ionic equations for the reactions at the electrodes in this electrolysis.

Anode (positive electrode)

Cathode (negative electrode)

1.5. Iron is extracted from its oxide ore by reduction using carbon in a blast furnace.

i) Place the elements aluminium, carbon and iron in order of reactivity with the least reactive element first.

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ii) Use your answer to (e)(i) to explain why iron is extracted by reduction using carbon but aluminium is not.

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1.6. What is the name of the ore of iron which consists mainly of iron(III) oxide?

1.7. Extended Only

Write balanced equations for the reactions occurring in the blast furnace which involve

i) The complete combustion of coke (carbon)

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ii) The production of carbon monoxide from carbon dioxide

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iii) The reduction of iron(III) oxide

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iv) The formation of slag

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