When excess aqueous ammonia is added to copper(II)sulphate (aq), the initial pale blue precipitate dissolves to give a __________ solution.Please fill in this blank by using the missing colour.

Expert Answers
pamsuegun eNotes educator| Certified Educator

A deep blue solution would be formed.  Adding excess ammonia allows the precipate to dissolve.  The Copper combines with the ammonia to form Tetraamminediaquacopper(II) which is deep blue.