Suggest4 marksStandard
An aqueous solution of copper(II) sulfate is pale blue. When concentrated hydrochloric acid is added, the solution turns green. Suggest why the colour changes when the ligand is changed from water to chloride ions.
CAIE A Level Chemistry 9701 · Chemistry of transition elements
Chemistry of transition elements: suggest 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.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
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