Explain4 marksStandard
A student adds a small piece of sodium metal to a sample of phenol. State what is observed and write an equation for the reaction. Explain why this reaction shows that phenol is more acidic than ethanol.
CAIE A Level Chemistry 9701 · Hydroxy compounds
Hydroxy compounds: explain question
How this question is marked
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.
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