CAIE A Level Chemistry 9701 · Electrochemistry
A student wishes to measure the standard electrode potential of the electrode. The electrode is made by dipping a platinum wire into a solution containing both and ions.
(a) Explain why a platinum wire is used for this electrode. (b) Describe how the student would measure the standard electrode potential of this electrode, including the conditions needed.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.