Colours of inorganic ions and complexes Flashcards
1
Q
[Cu(H2O)6]2+
A
pale blue solution
2
Q
Cu(OH)2 (s)
A
pale blue precipitate
3
Q
[Cu(NH3)4(H2O)2]2+
A
dark blue solution
4
Q
CuCl4 2-
A
yellow solution
5
Q
CuI
A
white precipitate
6
Q
CuSO4
A
blue solution
7
Q
Cu
A
brown solid
8
Q
CoCl4 2-
A
blue solution
9
Q
[Cr(H2O)6]3+
A
pale purple solution (can often look green due to impurities)
10
Q
Cr(OH)3 (s)
A
dark green precipitate
11
Q
[Cr(NH3)6]3+
A
purple solution
12
Q
[Cr(OH)6]3-
A
dark green solution
13
Q
Cr2O7 2-
A
orange
14
Q
CrO4 2-
A
yellow solution
15
Q
[Mn(H2O)6]2+
A
pale pink
16
Q
Mn(OH)2 (s)
A
pale brown precipitate
17
Q
[Fe(H2O)6]2+
A
pale green solution
18
Q
Fe(OH)2 (s)
A
dark green precipitate
(goes rusty brown/orange-brown as it oxidises to Fe(OH)3)
19
Q
[Fe(H2O)6] 3+
A
yellow solution
20
Q
Fe(OH)3 (s)
A
orange-brown precipitate
21
Q
MnO4 -
A
purple
22
Q
Mn 2+
A
very pale pink (almost colourless in titrations)
