Transition Metals in Aqueous Solution part 2

Part 2 of the reactions of aqueous transition metal ions, this time covering ammonia. As before, start from the top :) note: the result for Cu2+ in excess ammonia (deep blue box) is [Cu(NH3)4(H2O)2]2+, it wouldn't fit in the box :( sorry!

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  • Ammonia (NH3) in small amounts
    • [M(H2O)6]2+
      • Fe: pale green solution
      • Co: pink solution
      • Cu: pale blue solution
    • [M(H2O)6]3+
      • Fe: yellow/purple/brown solution
      • Al: colourless solution
      • Co: ruby solution
    • M(H2O)4(OH)2
      • Fe: green precipitate
      • Co: blue precipitate
      • Cu: pale blue precipitate
    • M(H2O)3(OH)3
      • Fe: brown precipitate
      • Al: white precipitate
      • Cr: green precipitate
    • Ammonia (NH3) in excess
      • Fe
        • M(H2O)4(OH)2
          • Fe: green precipitate
          • Co: blue precipitate
          • Cu: pale blue precipitate
      • [Co(NH3)6]2+ (yellow/brown solution)
        • Oxidised in air to brown [Co(NH3)6]3+
      • Only the ones beginning with C do funky stuff with excess ammonia
      • Fe/Al
        • M(H2O)3(OH)3
          • Fe: brown precipitate
          • Al: white precipitate
          • Cr: green precipitate
      • [Cr(NH3)6]3+ (purple solution)
      • [Cu(NH3)4(H2O)2]2+ (deep blue solution)

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