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4 marksElectrochemistry

CSEC Chemistry · January 2016 · Paper 2 · Question 4(a)(iii)

Dilute sulfuric acid is the electrolyte in car batteries. Remi investigated a sample of this electrolyte using electrolysis.

Draw a clearly labelled line diagram to represent an electrolytic cell.

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Other parts of this question

  1. 4(a)(i)Define the term 'anion'.[1 mark]
  2. 4(a)(ii)What anions will be present in a sample of this electrolyte?[1 mark]
  3. 4(b)Calculate the volume of hydrogen gas liberated at STP, if a current of 965 A is passed through the circuit for 1 hour. (Q = I × t, F = 96 500 C mol⁻¹. At STP,…[5 marks]
  4. 4(c)Remi also wants to purify an impure nickel sample by electrolysis. Suggest how he could modify the line diagram drawn in (a) (iii) on page 16 in order to…[4 marks]

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