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2 marksMixtures and Separations

CSEC Chemistry · January 2007 · Paper 2 · Question 3(a)(iv)

Under normal conditions, approximately 18% of hydrogen and nitrogen in the Haber process are converted to ammonia. Unreacted gases are separated and recycled. With reference to the properties of ammonia, nitrogen and hydrogen, suggest ONE way ammonia can be separated from the other gases. Give a reason.

With reference to the properties of ammonia, nitrogen and hydrogen, suggest ONE way that ammonia can be separated from the other gases. Give a reason for your answer.

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Other parts of this question

  1. 3(a)(i)Over what range of temperatures and pressures is ammonia NORMALLY produced by the Haber process?[1 mark]
  2. 3(a)(ii)a)Based on the information given in Figure 2, deduce whether increased yields of ammonia would result from conditions of high or low temperature.[2 marks]
  3. 3(a)(ii)b)Based on the information given in Figure 2, deduce whether increased yields of ammonia would result from conditions of high or low pressure.[1 mark]
  4. 3(a)(iii)Suggest TWO reasons why ammonia is not usually produced at 100°C and 1200 atm.[2 marks]
  5. 3(b)(i)Write a balanced equation for the reaction between chlorine and ammonia.[2 marks]
  6. 3(b)(ii)Both NH4Cl and NH2Cl dissolve in water. Aqueous NH4Cl conducts electricity, but aqueous NH2Cl does not. What does this information suggest about the type of…[2 marks]
  7. 3(b)(iii)Draw a dot-cross diagram to show the bonding in NH2Cl.[2 marks]
  8. 3(b)(iv)Suggest ONE reason why NH2Cl dissolves in water.[2 marks]

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