Transition Metal Colours
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Last updated 2:29 PM on 4/14/25
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21 Terms
1
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[Cu(H2O)6]2+
pale blue
2
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Cu(OH)2
pale blue precipitate
3
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[Cu(NH3)4(H2O)2]2+
dark blue
4
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CuCl42-
yellow
5
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Cu+ (reduction of Cu2+ with I-)
white precipitate (CuI) and brown I2
6
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Cu2+/Cu (Disproportionation of Cu+)
brown solid (Cu) and blue solution (CuSO4)
7
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CoCl42-
blue
8
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[Cr(H2O)6]3+
pale purple (heat → green)
9
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Cr(OH)3
dark green precipitate
10
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[Cr(NH3)6]3+
purple
11
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[Cr(OH)6]3-
dark green
12
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Cr2O72-
orange
13
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CrO42-
yellow
14
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[Mn(H2O)6]2+
pale pink
15
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Mn(OH)2
pale brown precipitate
16
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[Fe(H2O)6]2+
pale green
17
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Fe(OH)2
dark green precipitate
18
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[Fe(H2O)6]3+
yellow
19
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Fe(OH)3
orange-brown precipitate
20
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MnO4-/Fe2+ → Mn2+/Fe3+
purple (MnO4-) → pale pink (Mn2+)
21
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I-/Fe3+ → I2/Fe2+
orange-brown (Fe3+) → brown (I2)
