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2 marksOxidation – Reduction Reactions

CSEC Chemistry · January 2013 · Paper 2 · Question 1(c)(ii)

Identify the oxidizing agent in the equation in (c) (i), and give a reason, in terms of oxidation numbers, why the agent is oxidizing.

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Other parts of this question

  1. 1(a)Define the term 'rate of reaction'.[1 mark]
  2. 1(b)Read, from the diagrams in Figure 1 and record in Table 1, the volume of the gas produced for EACH experiment. Experiment 1 has been done for you.[3 marks]
  3. 1(c)(i)Write a balanced chemical equation, including state symbols, for the reaction between zinc metal and dilute hydrochloric acid.[2 marks]
  4. 1(c)(iii)Calculate the maximum volume of hydrogen gas, at room temperature and pressure (RTP), that would be produced when 1.0 gram of zinc metal reacts with excess…[3 marks]
  5. 1(d)Compare the volume of gas produced in Experiments 2, 3 and 4, to the volume produced in Experiment 1, and give an explanation in EACH case.[6 marks]
  6. 1(e)(i)With which granules, zinc or magnesium, will Experiment 1 be more reactive?[1 mark]
  7. 1(e)(ii)Using the same axes in Figure 2, sketch the curve when magnesium granules are used in Experiment 1.[1 mark]
  8. 1(f)(i)An outline of the steps for a procedure you can use[4 marks]
  9. 1(f)(ii)A list of the main observations that would be expected at EACH stage of the experiment[2 marks]

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