Colours of Transition elements and compounds

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Last updated 10:48 AM on 4/28/26
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15 Terms

1
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MnO4(-) +7

Purple

2
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Mn2+

Pale pink

3
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Cr2O7(2-) +6

Orange

4
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Cr3+

Green

5
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Fe2+

Pale green

6
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Fe3+

Yellow-brown

7
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Cu2+

Blue

8
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Cu(OH)2(H2O)4

Blue precipitate

9
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Fe(OH)2(H2O)4

Green precipitate that turns brown orange-brown in air (Fe(OH)3(H2O)3

10
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Fe(OH)3(H2O)3

Orange-brown precipitate

11
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Mn(OH)2(H2O)4

Light brown precipitate which darkens in the air

12
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Cr(OH)3(H2O)4

Grey-green precipitate

13
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[Cr(OH)6]2-

Dark green solution

14
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[Cu(NH3)4(H2O)2]2+

Dark blue solution

15
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[Cr(NH3)6]3+

Purple solution