INORGANIC cHEMISTRY - iII

Experiment 4

Principle

NiCl₂.6H₂O + 6NH₃ → [Ni(NH₃)₆]Cl₂ + 6H₂O

Materials required

Chemicals Required:

Nickel Chloride(3 gm), Nickel Ammonia (6-10 ml)

Apparatus Required:

Beaker, Glass Road, Glass Funnel, Filter paper, Conical Flask.

Procedure

1. Dissolve 6 grams Nickel Chloride in 10 ml warm water.

2. Filter if any insoluble impurities are present.

3. Add about (10-12 ml) Ammonia drop wise with constant stirring.

4. Until the green precipitate of Nickel Hydroxide has dissolved.

5. Add about 5 ml alcohol and stir well.

6. Allow the mixture to stand at room temperature for 30 minutes.

7. Filter the crystals of Hexa Ammine Nickel(II) chloride.

8. Wash with alcohol.

9. Dry and weigh the product.

Result

1. Theoritical Yield=……………

2. Practical Yield=……………..

% Yield= Practical Yield*100/Theoritical Yield

3. % Yield=………………..

Conclusion

1. Theoritical Yield=……………

2. Practical Yield=……………..

% Yield= Practical Yield*100/Theoritical Yield

3. % Yield=………………..

Reference Material

1. Vogel’s textbook of quantitative Chemical Analysis.

Questions

1. What is the geometry of the complex?

2. Calculate the oxidation state of Nickel.

3. Define spectrochemical series.