Okay Tony, there are only two things I can think of.
1. Depending on how they got the CuSO4, a slight adjustment in pH may be needed. e.g. they may have used conc sulfuric to dissolve the solid copper
.
2. They want you to analyse ammonical copper ([Cu(NH3)6]2+) for some reason. Do you know how strong the ammonium solution was?
Mark