when analysing copper ammine complex ..?

Question

the general formula Cu[NH3}x]SO4.H20 in which the NH3 molecules are bound to the CU2+ ion and are acting as ligands, why is it necessary to use very conc.NH3 solution to prepare the complex?

and what would happen if i wash the crystals with water?

Answer 1

1. Because you're trying to drive the reaction to completion with an element, Cu(II), which has a labile coordination sphere.

2. The crystals will lose NH3 and revert to CuSO4.

Pardon: I think that your future lies with cobalt(III).