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6 marksPhase Separations

CAPE Chemistry Unit 2 · 2016 · Paper 2 · Question 5(b)(iii)

A and B are components of a liquid which forms an azeotropic mixture.

Using the graph showing the composition of a minimum boiling point mixture, explain clearly the result of distilling a mixture of Composition X as indicated.

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Other parts of this question

  1. 5(a)(i)State Raoult's law for an ideal mixture of two liquids.[2 marks]
  2. 5(a)(ii)List TWO characteristics of an ideal solution.[2 marks]
  3. 5(b)(i)Define the term 'azeotropic mixture'.[1 mark]
  4. 5(b)(ii)State ONE reason why azeotropes are NOT compounds.[1 mark]
  5. 5(c)An aqueous solution contains 2.5 g of a compound in 50 cm³ of solution. The partition coefficient of the compound between water and an organic solvent is…[3 marks]

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