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4 marksFirst Row Transition Elements

CAPE Chemistry Unit 1 · 2007 · Paper 2 · Question 3(f)

The presence of carbon monoxide in the blood can prevent oxygen from reaching the tissues.

Use the ligand exchange theory to account for this occurrence.

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Other parts of this question

  1. 3(a)State THREE OTHER characteristic properties of transition elements.[3 marks]
  2. 3(b)(i)What are the colours of aqueous Co²⁺?[2 marks]
  3. 3(b)(ii)What are the colours of aqueous Mn²⁺?[2 marks]
  4. 3(c)If aqueous Co²⁺ is heated to dryness, what colour is observed?[1 mark]
  5. 3(d)Explain what is meant by the term 'ligand'.[1 mark]
  6. 3(e)(i)Write the formula of the species formed, and describe what occurs when ammonia solution is added to aqueous copper (II) sulphate (IV).[2 marks]
  7. 3(e)(ii)Write the formula of the species formed, and describe what occurs when an excess of ammonia solution is added to (e)(i) on page 6.[2 marks]

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