ligand substitution colours Flashcards
1
Q
[Cu(H2O)6]2+
A
pale blue
2
Q
Cu(OH)2
A
NH3 dropwise to Cu2+ pale blue precipitate
3
Q
[Cu(NH3)4(H2O)2]2+
A
excess NH3 to Cu2+ = dark blue
4
Q
CuCl4 2-
A
excess HCl to Cu2+ = yellow
5
Q
Cu+
A
reduction of Cu2+ with I- = white ppt (CuI) and brown I2
6
Q
Cu2+/Cu
A
disproportionation of Cu+ = brown solid (Cu) and blue solution (CuSO4)
7
Q
CoCl4 2-
A
excess HCl = blue
8
Q
[Cr(H2O)6]3+
A
pale purple - heat –> green
9
Q
Cr(OH)3
A
NH3 dropwise to Cr3+= drak green precipitate
10
Q
[Cr(NH3)6] 3+
A
excess NH3 to Cr2+ = purple
11
Q
[CR(OH3)6]3-
A
excess OH- = dark green
12
Q
Cr2O7 2-
A
in 0.1 mol dm3 H2SO4 = orange
13
Q
CrO4 2-
A
with hot alakaline H2O2 = yellow
14
Q
A
