# What is the technique you would use to separate and collect hydrated copper (ll) sulfate, "CuSO"_4cdot5"H"_2"O" from its aqueous solution?

So make a saturated solution of $C u S {O}_{4} \left(a q\right)$, and slowly cool it. You should be able to grow huge, macroscopic crystals of $C u S {O}_{4} \cdot 5 {H}_{2} O$. Alternatively, layer a concentrated solution of $C u S {O}_{4} \cdot 5 {H}_{2} O \left(a q\right)$ with ethyl alcohol. You will be able to get beautiful, blue-coloured bricks out.