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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Extraction of metals

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Extraction of metals

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Paper 4Theory (Extended)1 marks

Extraction of iron from hematite involves several chemical reactions.

Description

Chemical Reactions in Iron Extraction

The extraction process includes the following reactions: (a) C + O → CO2 (b) C + CO2 → 2CO (c) Fe2O3 + 3CO → 2Fe + 3CO2 (d) CaCO3 → CaO + CO2 (e) CaO + SiO2 → CaSiO3

  1. a

    State the reaction that produces carbon dioxide from carbon and oxygen.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Extraction of metals

Paper 4Theory (Extended)2 marks

Description

Iron Extraction Reactions

Identify the products of the following reactions: (a) CaCO3 → ? (b) Fe2O3 + 3CO → ?

  1. a

    State the products of the reaction CaCO3 → ?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State the products of the reaction Fe2O3 + 3CO → ?

    Aim for approximately 1 distinct marking point.

    [1]