Hexaammine nickel II Chloride is a complex formed with nickel II Chloride and ammonia
Materials required
4g ammonium chloride
5g nickel II Chloride
Distilled water
10ml 30% ammonia
Procedure
Weigh out seperately 5g Nickel (II) chloride and 4g ammonium chloride in two seperate beakers.
Now preparing saturated solutions of them by
Adding 4ml of distilled water to nickel chloride and 10ml of water to ammonium chloride.
After preparation of the saturated solutions seperately, pour ammonium chloride solution into nickel chloride solution
Into this solution add 10ml of 30% cold ammonia and mix well. Allow the ppt to sediment now filter the precipitate. Wash the container with cold
ammonia solution to get all the solid out into the filtration unit and also wash the solid in filter paper with cold ammonia .
Dry the precipitate and weigh.
Nickel ions in water forms a complex
With 6 molecules of H2O around nickel 2+ ion.
When we add ammonia this water molecules are replaced by 6 molecules of ammonia forming the complex
[Ni(H2O)6]2+(aq) + 6NH3(aq) ==> [Ni(NH3)6]2+ +6H2O
Thanks to everyone who helped me do this video
. What purpose have NH4Cl?