Colour Complexes

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  • Created by: chunks-42
  • Created on: 06-01-16 09:40
Preview of Colour Complexes

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With NaOH With NH3 With NaCO3 With concentrated
HCl
Other products + H2O
+ NH4
+
+ H or + CO
2O 2+ + H2O
H 2O
2-
Cobalt NaOH: [Co(H
2O) 4(OH)
2]
BLUE/GREEN PPT CoCO 3 MAUVE
PPT [CoCl4]
BLUE PPT
[Co(H
2O)6]
2+
In air [Co(H
2O) 3(OH)
3]
PINK SOLN
Excess NH
3: [Co(H
2O) 4(OH)
2 STRAW PPT
In air [Co(NH 3)
6]
2+
Copper NaOH: [Cu(H
2O) 4(OH)
2]
BLUE PPT CuCO 3 GREEN PPT [CuCl4]
2-
[Cu(H
2O) 6]
2+ Excess NH
3: [Cu(NH 3)
4(H
2O 2]
2+
ROYAL BLUE YELLOW/GREEN
PPT PPT
Iron (II) In air [Fe(H
2O) 4(OH)
2]
[Fe(H
2O) 3(OH)
FeCO3
3] DARK GREEN -
[Fe(H
2O) 6]
2+
GREEN PPT ORANGE/BROWN SOLN PPT
Chromium [Cr(H
2O) 3(OH)
3]
GREY/GREEN PPT 2[Cr(H
2O) 3(OH)
3]
-
[Cr(H
2O) 6]
3+
Excess NaOH Excess NH3 GREY/GREEN PPT
3+
[Cr(H
2O) 6]
GREEN [Cr(H
2O) 3(OH)
3]
SOLN GREY/GREEN PPT
Aluminium [Al(H
2O) 3(OH)
3]
WHITE PPT 2[Al(H
2O) 3(OH)
3 -
[Al(H
2O) 6]
3+
Excess NaOH Excess NH3 WHITE PPT
[Al(H
2O) 6]
3+
[Al(H
2O) 3(OH)
3]
COLOURLESS WHITE PPT
Iron (III) [Fe(H
2O) 3(OH)
3]
ORANGE BROWN PPT 2[Fe(H
2O) 3(OH)
3] -
[Fe(H 2O) 6
]3+ ORANGE/BROWN
PPT

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