Quelpr
3 marksElectrochemistry

CSEC Chemistry · January 2010 · Paper 2 · Question 4(a)(ii)a)

Pair 2 consists of 1 mol dm⁻³ hydrochloric acid and 1 mol dm⁻³ ethanoic acid. The bulb glows for both substances, but glows more brightly for one.

State which substance causes the bulb to glow more brightly.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 4(a)(i)State whether or not the bulb will glow for EACH substance. Explain your answer for EACH substance.[4 marks]
  2. 4(a)(ii)b)Explain why the substance you have stated at a) causes the bulb to glow brighter than the other substance.[3 marks]
  3. 4(a)(iii)Write a balanced ionic equation for the reaction occurring at the cathode for any of the substances in Pair 2.[2 marks]
  4. 4(b)(i)Give the name for structure a.[1 mark]
  5. 4(b)(ii)State which of these hydrocarbons are isomers.[2 marks]
  6. 4(b)(iii)Which TWO hydrocarbons belong to the same homologous series? Give ONE reason for your answer.[2 marks]
  7. 4(b)(iv)Write the general formula of the isomers identified in (iii) above.[1 mark]

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