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1 markElectrochemistry

CSEC Chemistry · January 2008 · Paper 2 · Question 3(c)(ii)

In Experiment II, Solution P is replaced with Solution Q, and the bulb lights less brightly with Q than with P.

Suggest a suitable substance for Solution Q.

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Other parts of this question

  1. 3(a)Identify the processes which cause the bulbs to light in Experiments I and II. Explain how the processes differ.[4 marks]
  2. 3(b)Give the name of one substance which, if it replaces graphite in Experiment I, would cause the bulb NOT to light when the switch W is closed.[1 mark]
  3. 3(c)(i)Provide a suitable explanation for the difference observed with Solutions P and Q.[4 marks]
  4. 3(d)(i)What are the names of the parts of the apparatus labelled A and B in Experiment II?[4 marks]
  5. 3(d)(ii)What are the processes occurring at A and B?[4 marks]

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