Transition metals

Coloured compounds cont.
Copper sulfate appears dark blue (left). It is the dipole on water molecules, that surround the copper ion to form a complex ion, that disrupts the "d" orbitals of copper.
copper sulfate.
The anhydrous copper sulfate appears grey in color.
Anhydrous copper sulfate.
Cobalt chloride(CoCl2.6H2O) appears red.
Cobalt chloride
Nickel sulfate(NiSO4.6H2O) appears green
Nickel sulfate
Complex ions