Transition metals colours Flashcards
1
Q
Cr3+ in aqueous alkali
A
Grey green ppt [Cr(OH)3(H2O)3]
2
Q
Mn2+ in aqueous alkali
A
White brown ppt of [Mn(OH)2(H2O)4]
3
Q
Fe2+ in aqueous alkali
A
Pale green ppt of [Fe(OH)2(H2O)4]
4
Q
Fe3+ in aqueous alkali
A
Rust brown ppt of [FE(OH)3(H2O)3]
5
Q
Co2+ in aqueous alkali
A
Light blue ppt of [Co(OH)2(H2O )4]
6
Q
Ni2+ in aqueous alkali
A
Green ppt of [Ni(OH)2(H2O )4]
7
Q
Cu2+ in aq alkali
A
Pale blue ppt of [Cu(OH)2(H2O)4]
8
Q
Zn2+ in aq alkali
A
White ppt of [Zn(OH)2(H2O )2]
9
Q
Cr3+ excess OH
A
[Cr(OH)6] deep green solution
10
Q
Excess ammonia Cr3+
A
[Cr(NH3)6] green solution
11
Q
Co2+ excess ammonia
A
[Co(NH3)6] blue solution
12
Q
Ni2+ excess ammonia
A
Pale blue solution [Ni(NH3)6])
13
Q
Cu2+ excess ammonia
A
Deep blue solution [Cu(NH3)4(H2O)2]
14
Q
Zn2+ excess OH
A
Colourless solution [Zn(OH)4]
15
Q
Zn2+ excess Ammonia
A
Colourless solution [Zn(NH3)4]
