qdung92ct - 12-1-2012 at 06:59
In battery,
I take the surrounded metal (I think it's pure Zinc metal) and stick somewhat Manganese dioxide on it
I put Zinc into Sulfuric Acid ~4M to get Zinc Sulfate solution
Next I pour Acetone to this solution and I get precipitate
but I don't know what it is
By the way, In Ethanol, I pour it into Copper Sulfate solution and Potassium Nitrate solution (rate about 1:1) by syringe (not slowly)
Similarly, I get precipitate and dry it
But in Copper Sulfate, the precipitate has quite blue color and softer
Anyone plz explain it for me
Thanks 
[Edited on 12-1-2012 by qdung92ct]
HellstormOP - 12-1-2012 at 07:37
Most probably this is just the zinc sulfate you wanted, as it's insoluble in acetone or acetone-water mixtures.
EDIT: Ethanol has the same effect, as it greatly decreases the solubility of salts in water when poured into it. With copper sulfate, this just may be
the hydrate of the salt. As you described, it is blue and softer than potassium nitrate, which precipitates out without forming a hydrate.
[Edited on 12-1-2012 by HellstormOP]
qdung92ct - 13-1-2012 at 22:24
yeah
now i got it
thanks for ur explain
so may this process be known regenerating salts ?