CAIE A Level Chemistry 9701 · Chemistry of transition elements
A student adds an excess of aqueous to an aqueous solution containing ions. Suggest why the complex is converted into a complex containing as the only ligand. In your answer, refer to the number of dative bonds formed and the stability of the product.
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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