Mixing these two reagents would make a dilute solution of copper sulfate.
Yea
Not much. The Copper (II) sulfate will just dissolve in the water (at about 316g/L of water). Copper (II) sulfate is pretty friendly around water and not all that dangerous. It's used commercially.
water and copper(II)sulfate CuO + H2SO4 --> CuSO4 + H2O
the copper sulfate reacts and changes colour
Copper sulfate was used as a catalyst for the amalgamation of silver. We haven't now any other motivation to mix copper sulfate with mercury.
Because zinc displaces Copper to produce zinc sulfate and Copper
Copper sulfate (II) CuSO4 is blue; ammonia is a colorless gas. If you mix ammonia water and copper sulfate solution, you will actually form a Brilliant blue copper-ammonium complex that is very pretty. Copper sulfate is blue by itself and anhydrous ammonia is a clear gas with a choking odor.
IF THE COPPER SULFATE DISSOLVES IN WATER, HAS A BLUE COLOR. WHEN STEEL WOOL IS MIXED WITH COPPER SULFATE,, THE STEEL WOOL DISSAPEARS, A BROWNISH SOLID FORMS, AND THE COLOR OF THE SOLUTION CHANGES FROM BLUE TO GREEN.Copper is produced.
crystilisation
NH4OH + CuSO4 = CuNH3
Blue is the solution's color When blue CuSO4.5H2O (copper(II) sulfate pentahydrate) is dissolved, the solution turns blue. When white CuSO4 (anhydrous copper(II) sulfate) is dissolved, the solution turns also blue.
Any water soluble blue salt (and which does not react with water) can turn the solution blue. For example = Copper(II) sulfate[CuSO4], Oxovanadium(IV) sulfate[VOSO4], Copper(II) nitrate[Cu(NO3)2], etc.