# Electrolytic cells optimum conditions

I am wondering why acidified copper sulfate is used instead of regular copper sulfate solutions in electrolytic cells? What benefit does the acidified solution give?

• It prevents hydrolysis of copper(II) into copper hydroxide. Jun 27 at 9:52
• Your own reasoning, based on searching, reading and analysis, is supposed to be present to avoid the question closure for lack of own effort. Jun 27 at 13:09

The solutions of $$\ce{CuSO4}$$ are slightly acidic. This shows that a small proportion of the ions $$\ce{Cu^{2+}}$$ do react with water in an equilibrium : $$\ce{Cu^{2+} + H2O <=> Cu(OH)_2 + 2 H^+}$$ If some acid is added to such a solution, the equilibrium is displaced to the left-hand-side by action of mass, and no precipitate of $$\ce{Cu(OH)2}$$ appears in the solution.