H2 Transitional Metal Colours

Front 1

Colour of [Cu(H2O)6]

Back 1

Pale blue

Front 2

Colour of [Cu(NH3)4(H2O)2]

Back 2

Dark blue

Front 3

Colour of [Cu(Cl)4] 2-

Back 3

Yellowish (may appear green due to equilibrium with Cu2+)

Front 4

Colour and state of Cu(OH)2

Back 4

Pale blue ppt

Front 5

CuO

Back 5

Black solid

Front 6

CuCO3

Back 6

Green ppt

Front 7

Copper(I) iodide

Back 7

Cream ppt

Front 8

Cu2O

Back 8

Brick red ppt

Front 9

Cu2CO3

Back 9

Pale green solid

Front 10

[Fe(H2O)6] 2+

Back 10

Pale green

Front 11

Fe(OH2)

Back 11

Dirty green ppt (oxidises by atmospheric oxygen to Fe(OH)3)

Front 12

[Fe(H2O)6]3+

Back 12

Yellow

Front 13

Fe(OH)3

Back 13

Reddish brown ppt

Front 14

Mn2+

Back 14

Pale pink(appears colourless at low concentrations usually)

Front 15

MnO2

Back 15

Dark brown ppt

Front 16

MnO4 2-

Back 16

Dark green

Front 17

Mn(OH)2

Back 17

Off-white ppt

Front 18

MnCO3

Back 18

Light brown solid

Front 19

Mn2O3

Back 19

Dark brown solid

Front 20

MnO4 -

Back 20

Purple

Front 21

Cr3+

Back 21

Green

Front 22

Cr(OH)3

Back 22

Dirty green ppt

Front 23

[Cr(OH)6] 3-

Back 23

Dirty green solution

Front 24

Cr2o4 2-

Back 24

Yellow

Front 25

Cr2O7 2-

Back 25

Orange

Front 26

V 5+

Back 26

Yellow (may show green intermediate between V4+ and V5+)

Front 27

V 4+

Back 27

Blue (may show green intermediate between V4+ and V5+)

Front 28

V 3+

Back 28

Green

Front 29

V 2+

Back 29

Violet

Front 30

CuCl (sparingly soluble)

Back 30

White