OCR A-level Chemistry transition metal complex colours

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Last updated 12:22 PM on 6/3/26
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17 Terms

1
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[Cu(H2O)6]2+

Pale blue solution

2
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Cu(OH)2 (s)

Pale blue precipitate

3
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[Cu(NH3)4(H2O)2]2+

Dark blue solution

4
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CuCl4 2-

Yellow solution

5
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CoCl4 2-

Blue solution

6
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[Cr(H2O)6]3+

Pale purple solution

7
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Cr(OH)3 (s)

Grey-green precipitate

8
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[Cr(NH3)6] 3+

Purple solution

9
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[Cr(OH)6]3-

Dark green solution

10
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Cr2O7 2-

Orange solution

11
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CrO4 2-

Yellow solution

12
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[Mn(H2O)6] 2+

Pale pink solution

13
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Mn(OH)2 (s)

pale brown precipitate

14
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[Fe(H2O)6]2+

Pale green solution

15
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Fe(OH)2 (s)

Dark green precipitate

16
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[Fe(H2O)6]3+

Yellow solution

17
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Fe(OH)3 (s)

Orange brown precipitate