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2 marksForces of Attraction

CAPE Chemistry Unit 1 · 2006 · Paper 1 · Question 2(a)

Table 1 gives bond angles and boiling points for ammonia and water. Ammonia has a bond angle of 107° and boiling point of -31 °C. Water has a bond angle of 104.5° and boiling point of 100 °C.

Sketch the shape of BOTH the water and ammonia molecules.

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Other parts of this question

  1. 2(b)(i)Explain the difference in the bond angles of the ammonia and water molecules.[3 marks]
  2. 2(b)(ii)Explain the difference in the boiling points of water and ammonia.[2 marks]
  3. 2(c)(i)Suggest the shape of a molecule of hydrogen sulphide.[1 mark]
  4. 2(c)(ii)How would the boiling point of hydrogen sulphide compare with that of ammonia? Explain your answer.[2 marks]

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