Quelpr
2 marksElectrochemistry

CSEC Chemistry · January 2005 · Paper 2 · Question 4(b)(i)

When the electrolyte in the cell (Figure 3) is dilute sulphuric acid, the ratio of gases collected in A and B is approximately 2:1.

Identify the gases in tubes A and B.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

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(a)(ii)Explain your answer to (a) (i).[1 mark]
  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]

More practice: the rest of this paper · more Electrochemistry questions · all CSEC Chemistry past papers