5.3.1 transition metal colours

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Chemistry

A-Level Chemistry

OCR

Physical Chemistry & Transition Elements (A Level Only)

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36 Terms

1
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[Cu(H2O)6]2+ hydrated ion colour

blue solution

2
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[Cu(H2O)6]2+ and dilute OH-/NH3

blue precipitate

3
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[Cu(H2O)6]2+ and dilute OH-/NH3 formula

[Cu(H2O)4(OH)2]

4
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[Cu(H2O)6]2+ and concentrated/excess OH-

no change

5
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[Cu(H2O)6]2+ and concentrated/excess NH3

deep blue solution

6
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[Cu(H2O)6]2+ and concentrated/excess NH3 formula

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

7
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[Cu(H2O)6]2+ and concentrated HCl

yellow solution

8
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[Cu(H2O)6]2+ and concentrated HCl formula

[CuCl4]2-

9
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[Cr(H2O)6]3+ hydrated ion colour

violet solution

10
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[Cr(H2O)6]3+ and dilute OH-/NH3

green precipitate

11
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[Cr(H2O)6]3+ and dilute OH-/NH3 formula

[Cr(H2O)3(OH)3]3+

12
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[Cr(H2O)6]3+ and concentrated/excess OH-

green solution

13
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[Cr(H2O)6]3+ and concentrated/excess OH- formula

[Cr(OH)6]3-

14
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[Cr(H2O)6]3+ and concentrated/excess NH3

purple solution

15
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[Cr(H2O)6]3+ and concentrated/excess NH3 formula

[Cr(NH3)6]3+

16
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[Fe(H2O)6]3+ hydrated ion colour

yellow solution

17
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[Fe(H2O)6]3+ and dilute OH-/NH3

brown precipitate

18
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[Fe(H2O)6]3+ and dilute OH-/NH3 formula

[Fe(H2O)3(OH)3]

19
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[Fe(H2O)6]3+ and concentrated/excess OH-

no change

20
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[Fe(H2O)6]3+ and concentrated/excess NH3

no change

21
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[Fe(H2O)6]2+ hydrated ion colour

green solution

22
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[Fe(H2O)6]2+ and dilute OH-/NH3

green precipitate, brown on standing

23
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[Fe(H2O)6]2+ and dilute OH-/NH3 formula

[Fe(H2O)4(OH)2]

24
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[Fe(H2O)6]2+ and concentrated/excess OH-

no change

25
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[Fe(H2O)6]2+ and concentrated/excess NH3

no change

26
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[Mn(H2O)6]2+ hydrated ion colour

pink solution

27
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[Mn(H2O)6]2+ and dilute OH-/NH3

pale brown precipitate

28
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[Mn(H2O)6]2+ and dilute OH-/NH3 formula

[Mn(H2O)4(OH)2]

29
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[Mn(H2O)6]2+ and concentrated/excess OH-

no change

30
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[Mn(H2O)6]2+ and concentrated/excess NH3

no change

31
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[Co(H2O)6]2+ hydrated ion colour

pink solution

32
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[Co(H2O)6]2+ and dilute OH-/NH3

blue precipitate

33
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[Co(H2O)6]2+ and dilute OH-/NH3 formula

[Co(H2O)4(OH)2]

34
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[Co(H2O)6]2+ and excess/concentrated OH-

no change

35
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[Co(H2O)6]2+ and concentrated/excess NH3

yellow-brown solution (brown on standing)

36
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[Co(H2O)6]2+ and concentrated/excess NH3 formula

[Co(NH3)6]2+

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