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1 markElectrochemistry

CSEC Chemistry · January 2005 · Paper 2 · Question 4(a)(ii)

Figure 3 shows apparatus for electrolysing electrolytes, including a bulb and inert electrodes A and B.

Explain your answer to (a) (i).

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Other parts of this question

  1. 4(a)(i)What will happen to the bulb when the electrolyte is replaced with pure water?[1 mark]
  2. 4(b)(i)Identify the gases in tubes A and B.[2 marks]
  3. 4(b)(ii)By considering the reactions that occur at the electrode surfaces, explain the occurrence of the 2:1 ratio in the gases collected in A and B. Use balanced…[5 marks]
  4. 4(c)(i)If the bulb in Figure 3 is replaced with an ammeter, what will happen to the reading on the ammeter if the electrolyte is changed from dilute sulphuric acid to…[1 mark]
  5. 4(c)(ii)Explain your answer to (c) (i).[2 marks]
  6. 4(d)What adjustments have to be made to Figure 3 in order to copper-plate a spoon?[3 marks]

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