Ligands and Colours Flashcards
1
Q
What colour is [Fe(H2O)6] 2+
A
Pale Green
2
Q
What colour is [Fe(H2O)6)] 3+
A
Pale yellow
3
Q
What colour is [Cu(H2O)6] 2+
A
Blue
4
Q
What colour is [Cr(H2O)6] 3+
A
Dark Green
5
Q
What colour is [Co(H2O)6] 2+
A
Pink
6
Q
What colour is [CuCl4] 2-
A
- Yellow / Green
7
Q
What colour is [CoCl4] 2-
A
Blue
8
Q
What happens when you add Ammonia to [Cu(H2O)6] 2+
A
- Colour change from Blue to Royal blue
- Forms [Cu(NH3)^4 (H2O)^2] 3+
9
Q
How many different isomers are there for [Cu(NH3)^4 (H2O)^2] 3+ and what are they
A
- 2 Isomers
- Cis and Trans
- Cis where 2 H2O are next to each other
- Trans where they are across
- Trans is more likely
10
Q
Reaction between Conc. HCl and [Co(H2O)6] 2+
A
- [CoCl4] 2-
11
Q
Reaction between Conc. HCl and [Cu(H2O)6] 2+
A
- [CuCl4] 2-
12
Q
Is ligand exchange and equilibrium process
A
- Yes
- Therefore a reversable reaction
- For instance the reaction of hydrataded copper(II) and NH3
- Excess NH3 drives it towards the deeper royal blue
- Water drives towards the paler hydride
13
Q
[Cr(H2O)6)] 3+ and some OH(-)
A
- Grey Green precipitate
- [Cr(H2O)3(OH)3]
14
Q
[Fe(H2O)6] 2+ and some OH(-)
A
- Dark green precipitate
- [Fe(H2O)4(OH)2]
15
Q
[Cu(H2O)6] 2+ and some OH(-)
A
- Pale blue precipitate
- [Cu(H2O)4(OH)2]
