Transition metals colours

colour of Cu²⁺ solution

blue

colour of Fe²⁺ solution

pale green

colour of Fe³⁺ solution

pale yellow

colour of Mn²⁺ solution

pale pink

colour of Cr³⁺ solution

violet or green

colour of Cu²⁺ in NaOH

blue precipitate

colour of Fe²⁺ in NaOH

green precipitate

colour of Fe³⁺ in NaOH

orange-brown precipitate

colour of Mn²⁺ in NaOH

light-brown precipitate

colour of Cr³⁺ in NaOH

grey-green precipitate

colour of Cu²⁺ in excess NaOH

insoluble

colour of Fe²⁺ in excess NaOH

insoluble

colour of Fe³⁺ in excess NaOH

insoluble

colour of Mn²⁺ in excess NaOH

insoluble

colour of Cr³⁺ in excess NaOH

dark-green

colour of Cu²⁺ in NH₃

blue precipitate

colour of Fe²⁺ in NH₃

green precipitate

colour of Fe³⁺ in NH₃

orange-brown precipitate

colour of Mn²⁺ in NH₃

light-brown precipitate

colour of Cr³⁺ in NH₃

grey-green precipitate

colour of Cu²⁺ in excess NH₃

dark-blue solution

colour of Fe²⁺ in excess NH₃

insoluble

colour of Fe³⁺ in excess NH₃

insoluble

colour of Mn²⁺ in excess NH₃

insoluble

colour of Cr³⁺ in excess NH₃

purple

colour of Cu²⁺ in excess concentrated HCl

yellow

colour of Cr₂O₇^2- (aq)

orange

colour of Cr³⁺(aq) ions

green

colour of Cr²⁺(aq) ions

pale blue

colour of MnO₄^- (aq) ions

purple