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5 marksThe Mole Concept

CAPE Chemistry Unit 1 · 2010 · Paper 2 · Question 1(d)

Some ammonia gas is dissolved in water. The exact concentration of the solution is unknown and has to be determined.

Describe an experiment that would determine the concentration of the aqueous ammonia.

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Other parts of this question

  1. 1(a)State the types of bonds (intra-molecular and inter-molecular) that exist in liquid ammonia.[2 marks]
  2. 1(b)(i)Write a balanced chemical equation for the reaction between calcium oxide and ammonium chloride.[2 marks]
  3. 1(b)(ii)Calculate the mass of ammonium chloride needed to produce 1 dm³ of ammonia at RTP (room temperature and pressure). (Molar volume = 24 dm³ at RTP)[2 marks]
  4. 1(c)(i)Under which of the following sets of conditions, I, II or III, would the deviation be LEAST?[1 mark]
  5. 1(c)(ii)State TWO assumptions of the kinetic theory as it pertains to ideal gases.[2 marks]
  6. 1(c)(iii)Which assumption of the kinetic theory as it pertains to ideal gases would MOST likely account for your answer to (c) (i) above?[1 mark]

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