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Variable Oxidation States



Transition Metals

AQA Content

Perform calculations for these titrations and similar redox reactions.

Specification Notes

Transition elements show variable oxidation states.
Vanadium species in oxidation states IV, III and II are formed by the reduction of vanadate(V) ions by zinc in acidic solution.
The redox potential for a transition metal ion changing from a higher to a lower oxidation state is influenced by pH and by the ligand.
The reduction of [Ag(NH3)2]+ (Tollens’ reagent) to metallic silver is used to distinguish between aldehydes and ketones.
The redox titrations of Fe2+ and C2O42– with MnO4–



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