How to clean copper(II) sulfate crystals from sulfuric acid?

I am going to prepare copper(II) sulfate by electrolysis with sulfuric acid for crystal growing.


How would I separate the copper(II) sulfate from the sulfuric acid left over from the electrolysis process in solution?


I think, one way would be to make copper(II) oxide and mix it with the solution so that I get more copper(II) sulfate out of the solution by using left over acid. Then separating copper oxide would be easy.


