Topic 15 Transition Metals Flashcards
1
Q
Why are transition metal complexes colourful?
A
- the ligand causes the d-orbitals to split into 2
- light energy in the visible region is absorbed to promote electrons to higher d orbitals
- the unabsorbed/ complementary light is transmitted
2
Q
What is the colour of V2+ in aqueous solution?
A
violet
3
Q
What is the colour of V3+ in aqueous solution?
A
green
4
Q
What is the colour of VO 2+ in aqueous solution?
A
blue
5
Q
What is the colour of VO2 + in aqueous solution?
A
yellow
6
Q
What is the colour of Cr3+ in aqueous solution?
A
green
7
Q
What is the colour of CrO7 2- in aqueous solution?
A
orange
8
Q
What is the colour of Fe2+ in aqueous solution?
A
pale green
9
Q
What is the colour of Fe3+ in aqueous solution?
A
yellow
10
Q
What is the colour of Co2+ in aqueous solution?
A
pink
11
Q
What is the colour of Cu2+ in aqueous solution?
A
pale blue
