Edexcel A-Level Chemistry A2 17.11 Colour Changes in Transition Metal Ions May Arise As a Result of Changes in I Oxidation Number of the Ion Ii Ligand Iii Questions

Link the visible colour change to the chemical change first: oxidation state, ligand identity or hydration can alter the d-orbital energy gap or the ion present.

Exam points

Explain colour changes from different oxidation states such as Fe2+ to Fe3+.
Link ligand exchange or hydration changes to a different d-orbital energy gap.
Classify reactions as ligand exchange, redox or neutralisation from observations.

[Maximum number: 2]

The diagram summarises some reactions of copper compounds.

Figure for Question Edexcel A-Level Chemistry A2 17.11 Colour Changes in Transition Metal Ions May Arise As a Result of Changes in I Oxidation Number of the Ion Ii Ligand Iii Questions question 1 — Edexcel A-Level Chemistry A2

T and V are the same type of chemical species.

Suggest an explanation for the change of V into T on shaking.

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Edexcel A-Level Chemistry A2 17.11 Colour Changes in Transition Metal Ions May Arise As a Result of Changes in I Oxidation Number of the Ion Ii Ligand Iii Questions question 1