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2 marksElectrochemistry

CSEC Chemistry · May/June 2014 · Paper 2 · Question 4(b)(iii)

Figure 5 shows a diagram of apparatus proposed by students to investigate the electrical conductivity of aqueous lead(II) nitrate, ethanol, and aqueous ammonia.

Classify the three substances to be investigated (aqueous lead(II) nitrate, ethanol and aqueous ammonia) EITHER as conductors OR non-conductors.

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Other parts of this question

  1. 4(a)(i)With reference to the bonding, account for the differences in states and melting points of the oxides of magnesium and sulfur.[6 marks]
  2. 4(a)(ii)Explain whether the oxides will conduct electricity and, if so, under what conditions.[4 marks]
  3. 4(b)(i)Why is the circuit as represented in Figure 5 not suitable to achieve the aim of the experiment?[1 mark]
  4. 4(b)(ii)Modify the diagram to produce a circuit that is suitable for achieving the aim of this experiment.[2 marks]

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