I make CuSO4 by mixing stechiometric quantities of Cu2O with sulfuric acid and diluiting all whith 3,6% hydrogen peroxide until all the copper is dissolved. the problem is that i noticed the formation of a white and light precipitate.
i was able to separate easily to obtain a pure slution of copper sulfate but i couldn't really get what that stuff is.
the Cu2O was obtained from electrolisys of a NaCl solution at 18 V and sulfuric acid (that should be around 90%) by puryfing a drain cleaner. at first i tought it was CuCl impuritiy from the copper oxide but i get the precipitate even by making the same procedure written upside with pure copper.
i washed the compound many times with water and when dried it took a pale pink color.
thank you, that's my first ever post in a forum, don't worry about me using sulfuric acid because i work on really small quantities with glasses and mask, i apologise for my (hope not so) bad english, and please be kind, this is the first time i write in a forum.