OCR A Level Chemistry: Transition metal colours | Quizlet

[Cu(H2O)6]2+

Pale blue Solution

[Fe(H2O)6]2+

Pale green solution

[Fe(H2O)6]3+

Yellow Solution

[Mn(H2O)6]2+

Pale Pink Solution

[Cr(H2O)6]3+

Pale Purple Solution

Cu(OH)2

Pale Blue PPT

Fe(OH)2

Green PPT which darkens on standing

Fe(OH)3

Orange Brown PPT

Mn(OH)2

Light brown PPT which darkens on standing

Cr(OH)3

Grey-green PPT

[Cr(OH)6]3-

Dark green solution

Cr2O7 2-

Orange solution

[Cu(NH3)4(H2O)2]2+

Dark blue solution

[CuCl4]2-

Yellow solution

[Cr(NH3)6]3+

Purple solution

I2(aq)

Brown solution

CrO4 2-

Yellow solution

AgI

Yellow PPT does not dissolve in CONC NH3

AgBr

Cream PPT dissolves in CONC NH3

AgCl

White PPT dissolves in dilute NH3

Permanganate ion

MnO4-

Dichromate ion

Cr2O7 2-

Chromate ion

CrO4 2-

MnO4- and Fe2+ colour change

Purple to pale pink

MnO4- and Fe2+ products

Mn2+ and Fe3+

Cu2+ and I- products

CuI(s) and I2

CuI(s)

White ppt