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4 marksReactivity and Extraction of Metals

CSEC Chemistry · May/June 2014 · Paper 2 · Question 5(a)(ii)

Figure 6 shows an experiment with copper(II) sulfate solution and two metal foils: zinc and silver. Observations are given for both setups.

Explain why the zinc foil reacted with the copper(II) sulfate solution but the silver foil did not.

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Other parts of this question

  1. 5(a)(i)Write a balanced equation with state symbols for the reaction that occurs between zinc and the copper(II) sulfate solution.[2 marks]
  2. 5(a)(iii)Would aluminium displace copper from the copper(II) sulfate solution? Give a reason for your answer.[2 marks]
  3. 5(b)(i)List the conditions necessary for the corrosion of iron.[2 marks]
  4. 5(b)(ii)Why is painting effective in preventing iron from rusting?[1 mark]
  5. 5(c)Explain why duralumin is used in preference to aluminium for the manufacture of aircraft.[4 marks]

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