Flashcards
Transition Elements 3 - Ligand Substitution
Cards in this deck (15)
- 1Reaction of Ammonia with Cu(aq)[Cu(H2O)6]2+(aq) + 4 NH3(aq) -->
[Cu(NH3)4(H2O)2]2+(aq) + 4H2O(l)
First forms Cu(OH2)
Dissolves in excess ammonia - 2What are the colour changes?[Cu(H2O)6]2+
Cu(OH)2
[Cu(NH3)4(H2O)2]2+
Pale blue -> blue -> Dark blue - 3Cu with excess HCl[Cu(H2O)6]2+(aq) + 4 Cl-(aq)
<->
[CuCl4]2- (aq) + 6H2O (aq) - 4Colour changesPale blue --> Green IM --> Yellow
- 5Why only 4 Cl-?As they're large, can only nestle this many around metal ion.
- 6What happens if you add water?Changes to a blue colour
- 7Ammonia with Cr(aq)[Cr(H2O)6]3+(Aq) + 6 NH3(aq)
->
[Cr(NH3)6]3+(aq) + 6 H2O (l) - 8Colour changesViolet -> Grey-green precipitate -> Purple
- 9Haemoglobin ligand subsititutionCarbon monoxide subbed for O to form carboxyhaemoglobin
Irreversible
higher <3 for Hb than O2 - 10Precipitation w/ NaOH Cu2+Cu2+ + 2OH- -> Cu(OH)2 (s)
Blue --> Blue - 11Fe2+Fe2+ + 2OH- --> Fe(OH)2 (s)
Pale green --> Green
Fe(OH)2 --> Fe(OH)3(s)
Green ---> Orange-brown - 12Fe3+Fe3+(aq) + 3OH- --> Fe(OH)3 (s)
Pale yellow --> Orange-brown - 13Mn2+Mn2+ -> 2OH- ---> Mn(OH)2 (s)
Pale pink ---> light-brown (darkens in air) - 14Cr3+Cr3+ + 3OH- --> Cr(OH)3 (S)
Violet ---> Grey-green
Cr(OH)3 + 3OH- ---> [Cr(OH)6]3+(aq)
Grey-green ---> Dark green - 15Reactions w/ excess ammoniaFe2+/Fe3+/Mn2+ react in the same way they do w/ NaOH
Cr3+ and Cu2+ are the ones that are further soluble to excess NH3
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- User has deleted their subject information Flashcards on Transition Elements 3 - Ligand Substitution, created by Deleted user on 01/05/2018.
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- Created by I Shouldn't be awake · Apr 13, 2018
- Copied by I Shouldn't be awake · May 1, 2018
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