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Microscale chemistry: the transition elements

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Examine some of the solution chemistry of the transition elements by identifying evidence of complex formation and change in oxidation state

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Level

16-18 years

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Wales
- A/AS level
  - WJEC Chemistry
    - Unit 3: PHYSICAL AND INORGANIC CHEMISTRY
      - 3.4 Chemistry of the d-block transition metals
        (b) the most important oxidation states of Cr, Mn, Fe, Co and Cu and the colours of aqueous solutions of compounds containing Cr³⁺, CrO₄²⁻, Cr₂O₇²⁻, MnO⁴⁻, Co²⁺, Fe²⁺, Fe³⁺ and Cu²⁺
Northern Ireland
- A/AS level
  - CCEA Chemistry
    - Unit A2 2: Analytical, Transition Metals, Electrochemistry and Organic Nirtrogen Chemistry
      - 5.5 Transition metals
        5.5.3 demonstrate understanding that complexes consist of a central metal atom or ion surrounded by a number of ligands, defined as anions or molecules possessing lone pairs of electrons;
        5.5.12 use, as qualitative detection tests, the formation of precipitates of the hydroxides of Cr³⁺, Mn²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺ and Cu²⁺ with NaOH(aq) and NH₃(aq) and,where appropriate, their subsequent dissolution;
        5.5.13 recall the reduction of VO²⁺ (acidified ammonium metavanadate) by zinc to form VO²⁺, V³⁺ and V²⁺;
England
- A/AS level
Scotland
- Advanced Higher
  - SQA Chemistry
    - Inorganic and Physical Chemistry
      - Transition metals
        Oxidation states of transition metals
        Transition metals exhibit variable oxidation states of differing stability. Compounds of the same transition metal but in different oxidation states may have different colours.

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