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4 marksFirst Row Transition Elements

CAPE Chemistry Unit 1 · 2007 · Paper 2 · Question 6(a)(i)

The reaction shown in Figure 1 illustrates the reaction occurring between oxyhaemoglobin and carbon monoxide to form carboxyhaemoglobin.

Define the term 'ligand' and identify two ligands in the haemoglobin structures in Figure 1.

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Other parts of this question

  1. 6(a)(ii)State and explain the principle on which the reaction in Figure 1 is based.[2 marks]
  2. 6(b)(i)Using the information in Figure 1, account for the toxic effect of carbon monoxide at high concentrations.[3 marks]
  3. 6(b)(ii)Suggest a treatment for a patient suffering from overexposure to carbon monoxide and give a reason for your suggestion.[2 marks]
  4. 6(c)Account for the origin of colour in transition metal complexes.[4 marks]

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