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4 marksElectrochemistry

CSEC Chemistry · May/June 2014 · Paper 2 · Question 4(a)(ii)

Magnesium and sulfur are elements in the same period. Their oxides have different properties as shown in Table 2.

Explain whether the oxides will conduct electricity and, if so, under what conditions.

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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(b)(i)Why is the circuit as represented in Figure 5 not suitable to achieve the aim of the experiment?[1 mark]
  3. 4(b)(ii)Modify the diagram to produce a circuit that is suitable for achieving the aim of this experiment.[2 marks]
  4. 4(b)(iii)Classify the three substances to be investigated (aqueous lead(II) nitrate, ethanol and aqueous ammonia) EITHER as conductors OR non-conductors.[2 marks]

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