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5 marksSulfuric Acid

CAPE Chemistry Unit 2 · May/June 2019 · Paper 2 · Question 3(b)(iii)

The production of sulfuric acid in the contact process provides many useful products, but there are adverse impacts of the industry on the environment.

Discuss the actual conditions used in the formation of sulfur trioxide in the contact process. Your response should include conditions of temperature, conditions of pressure, suitability of any catalyst(s) used.

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Other parts of this question

  1. 3(a)(i)Identify EACH of the following components in Figure 6: A, B, C, D, E.[3 marks]
  2. 3(a)(ii)Write the formulae of the substances in the mixture F in Figure 6.[3 marks]
  3. 3(a)(iii)Write an equation to represent the reaction at EACH electrode during the production of aluminium.[2 marks]
  4. 3(a)(iv)Suggest THREE factors which may influence the location of a bauxite plant.[3 marks]
  5. 3(b)(i)Starting with sulfur, list the THREE main processes which occur during the production of sulfuric acid.[3 marks]
  6. 3(b)(ii)Using an appropriate equation, apply the principles of chemical equilibrium to deduce the theoretical conditions for the formation of sulfur trioxide.[5 marks]
  7. 3(b)(iv)State ONE impact of the sulfuric acid industry on the environment.[1 mark]
  8. 3(c)(i)Describe laboratory tests which would confirm the presence of PO4^3-.[3 marks]
  9. 3(c)(ii)Describe laboratory tests which would confirm the presence of CN-.[2 marks]

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