Nickel(II) chloride
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Nickel(II) chloride, also known as nickelous chloride, is a chemical compound. Its chemical formula is NiCl2. It contains nickel in its +2 oxidation state. It also contains chloride ions.
Properties
It is a yellow-green solid. It dissolves in water. It normally is attached to water molecules (hydrated). It reacts with ammonia to make a purple solution. It also reacts with hydrochloric acid to make a yellow solution. It reacts with bases to make nickel(II) hydroxide. Solutions of nickel(II) chloride have a pH of 4.
Preparation
It is made by dissolving nickel metal in hydrochloric acid. It also can be made by reacting nickel(II) oxide, nickel(II) carbonate, or nickel(II) hydroxide with hydrochloric acid.
Uses
It is used to electroplate nickel metal on metal objects. It is also used as a catalyst.
Safety
Nickel(II) chloride irritates skin and eyes. It can also cause cancer.
Nickel(II) Chloride Media
Color of various Ni(II) complexes in aqueous solution. From left to right, [Ni(NH3)6]2+, [Ni(en)3]2+, [NiCl4]2−, [Ni(H2O)6]2+
Crystals of hexammine nickel chloride
General reaction scheme for the isomerisation of dienols
Application of NiCl2 precatalyst.
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