CAIE A Level Chemistry 9701 · Electrochemistry
In aqueous solution, copper(I) chloride undergoes the following reaction.
Explain, in terms of changes in oxidation number and electron transfer, why this reaction is a disproportionation reaction. Identify the oxidising agent and the reducing agent.
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.