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2 marksOxidation – Reduction Reactions

CSEC Chemistry · January 2006 · Paper 2 · Question 2(a)

Steve places a zinc nail in a beaker containing aqueous copper (II) sulphate. Figures 2a and 2b show the contents of the beaker at the start and after three days.

Based on the observed differences between Figures 2a and 2b, name TWO ions that would most likely be present in the beaker after three days.

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Other parts of this question

  1. 2(b)Write ionic equation(s) to show the reactions that take place in the beaker in Figure 2b. Explain why these reactions occur.[4 marks]
  2. 2(c)Name the type of chemical reaction occurring in the experiment.[1 mark]
  3. 2(d)(i)Comment on how the RATE OF REACTION might be affected if the zinc nail is replaced by Magnesium metal. Explain your answer. Observation: (missing) Explanation:…[6 marks]
  4. 2(d)(ii)Comment on how the RATE OF REACTION might be affected if the zinc nail is replaced by Lead. Explain your answer. Observation: (missing) Explanation: (missing)[6 marks]
  5. 2(e)(i)State what effect this experimental arrangement will have on the bulb.[1 mark]
  6. 2(e)(ii)Explain your answer in (e)(i).[2 marks]

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