[Simone90]

Hi everyone.
Is it possible to separate copper sulfate from a bordeaux mixture?
The one i'm using, for 100 grams, is 20g of copper sulfate neutalized with calcium hydorxide and 80g of "coformulants".
So i took about 50g of the mixturre and added about 250g of water. The solution was really cloudy, lightly blue.
I let everything filter during the night and i end up with a clear dark brown solution. The filter was full of a blue sludge.

Does anyone have some suggestion avout what happened or what I could do?

Sorry for my english.

[chenbeier]

The blue sludge is copper hydroxide. This you can neutralize with sulfuric acid to obtain copper sulfate back.

[Simone90]

Hehe...i'm trying to extract copper sulfate to make sulfuric acid. I know i could just buy it, but it becomed a challange for me to make sulfuric acid and nitric acid with almost nothing. Copper sulfate is just one of the experiments i'm doing.
The problem with fertilizers is the they're full of junk.

[AWK]

Bordeaux mixture was prepared from copper sulfate, but it does not contain copper sulfate. Thermal decomposition of calcium sulfate needs very high temperature at which SO₃ decomposes to SO₂.