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2 marksRates of Reaction

CSEC Chemistry · May/June 2006 · Paper 2 · Question 5(b)(ii)

Ammonia is prepared industrially by the Haber process. In this process nitrogen and hydrogen react in the presence of a catalyst at approximately 200 atm and 400°C. The reaction is exothermic.

Explain the importance of using relatively high pressure in this process.

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  1. 5(a)(i)Suggest ONE suitable reagent that can be used as Y and ONE as W for the experiment.[2 marks]
  2. 5(a)(ii)Identify the process by which the ammonia gas that is produced at the bottom of the test tube comes in contact with the litmus paper at the mouth of the test…[1 mark]
  3. 5(a)(iii)Comment on the suitability of using the moist blue litmus paper to identify ammonia gas.[2 marks]
  4. 5(a)(iv)Instead of the litmus test used above, describe ONE OTHER chemical test that can be used to identify ammonia gas. Write a balanced equation to represent the…[4 marks]
  5. 5(b)(i)Name the catalyst used in the Haber process.[1 mark]
  6. 5(b)(iii)Draw a fully labelled energy profile diagram of the reaction for the production of ammonia during the Haber process. You should name the reactants and products…[3 marks]

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