How can copper sulfate be made by a neutralization reaction?

You can make copper sulfate by mixing copper(II) hydroxide and sulfuric acid in equimolar amounts:

Cu(OH)₂(s) + H₂SO₄(aq) CuSO₄(aq) + 2 H₂O(l)

Allowing the solution to evaporate (without heating) produces beautiful, bright blue copper(II) sulfate pentahydrate crystals, CuSO₄·5 H₂O, commonly known as 'blue vitriol'. Copper(II) sulfate pentahydrate is used to kill algae in pool and reservoir water, and is used as a copper source in animal feeds.

If you heat the pentahydrate strongly, you'll drive off the hydration waters and obtain a fine white powder. This is anhydrous copper(II) sulfate, CuSO₄.

You can also make copper(II) sulfate by electrolysis of copper metal in a sulfuric acid solution.

Author: Fred Senese senese@antoine.frostburg.edu

Copyright © 1997-2001 by Fred Senese
Comments & questions to senese@antoine.frostburg.edu
Last Revised 02/23/18.URL: http://antoine.frostburg.edu/chem/senese/101-hidden/acidbase/faq/how-is-copper-sulfate-made.shtml