Transition Element/Metal Compounds & Colours

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Last updated 1:43 PM on 10/13/26
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26 Terms

1
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Fe, Iron

[Fe(H2O)6]2+

Fe(OH)2

[Fe(H2O)6]3+

Fe(OH)3

[Fe(SCN)(H2O)5]2+

2
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[Fe(H2O)6]2+

pale green

3
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Fe(OH)2

green ppt

4
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[[Fe(H2O)6]3+

yellow

5
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Fe(OH)3

reddish brown ppt

6
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[Fe(SCN)(H2O)5]2+

blood red

7
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Cr, Chromium

[Cr(H2O)]6+

[Cr(OH)6]3-

CrO4 2-

Cr2O7 2-

8
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[Cr(H2O)]6+

green

9
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[Cr(OH)6]3-

dark green

10
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CrO4 2-

yellow

11
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Cr2O7 2-

orange

12
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Mn, Manganese

[Mn(H2O)6] 2+

[Mn(H2O)6] 3+

Mn(OH)2

Mn(OH)3

MnO4 -

MnO2

13
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[Mn(H2O)6] 2+

faint pink / colourless

14
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[Mn(H2O)6] 3+

violet

15
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Mn(OH)2

off white ppt

16
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Mn(OH)3

brown ppt

17
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MnO2

dark brown ppt

18
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MnO4 -

purple

19
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Co, Cobalt, [Co(H2O)6] 2+

pink

20
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Cu, Copper

CuCl

CuI

[Cu(H2O)6] 2+

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

CuCl4 2-

Cu(OH)2

21
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CuCl

white ppt

22
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CuI

white ppt

23
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[Cu(H2O)6] 2+

pale blue

24
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[Cu(NH3)4(H2O)2] 2+

dark blue or deep blue

25
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CuCl4 2-

yellow

26
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Cu(OH)2

pale blue ppt