Experiment copper (II) sulfate pentahydrate added ammonia, this is a copper complex?

Question

, my mass percent of ammonia + copper + sulfate is greater than 100%, that means no water in the complex, WHY IS THAT AND HOW IS THAT POSSIBLE?????

Answer 1

In the pentahydrate, copper(II) is bonded to four molecules of water and to the oxygen atoms of two sulfate anions. The fifth water is not coordinated, but links the sulfate anions via hydrogen bonding.
once you add ammonia, which is a trong chelating agent to Cu++, Cu(NH3)4++ complex ion is formed, in such a way that NH3 replaces H2O in the structure.
I tend to believe that water left at a vapor form.