Nickel chloride is the chemical compound NiCl2. The anhydrous salt is yellow, but the more familiar hydrate NiCl2ยท6H2O is green. Nickel chloride, in various forms, is the most important source of nick
Nickel(II) chloride hexahydrate
Color of various Ni(II) complexes in aqueous solution. From left to right, [Ni(NH3)6]2+, [Ni(en)3]2+, [Ni(H2O)5Cl]+, [Ni(H2O)6]2+