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F325 transition metals!

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    I'm revising for my A2 summer exam for OCR chemistry (F325) and i'm looking at the variable oxidation states for transition metals... I remember my teachers saying we don't need to know all of the colour changes. I think they said we need to know the Vanadium ones, but I can't remember the others?

    Does anyone have any ideas which ones we need to know?

    Thank you!
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    Hexaaqua Copper (II) ion [Cu(H2O)6]2+(aq) is blue.

    Tetraamine diaqua Copper (II) ion [Cu(NH4)4(H2O)2]2+(aq) is deep blue.

    Tetrachlorocuprate ion [CuCl4]2-(aq) is yellow (formed by reacting Hexaaqua Copper (II) ions with conc. HCl, it's an equilibrium rxn so it changes colour from blue to green to yellow.)

    Hexaaqua Cobalt (II) ion [CO(H2O)6]2+(aq) is pink.

    Tetrachlorocobaltate ion [CoCl4]2-(aq) is blue.

    I don't think you need to know the colours of any other TM ions.
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    (Original post by Cottrill)
    Hexaaqua Copper (II) ion [Cu(H2O)6]2+(aq) is blue.

    Tetraamine diaqua Copper (II) ion [Cu(NH4)4(H2O)2]2+(aq) is deep blue.

    Tetrachlorocuprate ion [CuCl4]2-(aq) is yellow (formed by reacting Hexaaqua Copper (II) ions with conc. HCl, it's an equilibrium rxn so it changes colour from blue to green to yellow.)

    Hexaaqua Cobalt (II) ion [CO(H2O)6]2+(aq) is pink.

    Tetrachlorocobaltate ion [CoCl4]2-(aq) is blue.

    I don't think you need to know the colours of any other TM ions.
    Thank you
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    Just to add, take a look at the syllabus when you are unsure of this kind of thing as it will tell you on there.

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