I know it hurts, but it would probably be best to start over, using an excess of concentrated copper sulfate solution and dilute metabisulfite
solution. If you do that you should get a much cleaner result and not have to worry about separating two precipitates. That red stuff might not even
be Chevreul's salt, it could be copper(I) oxide. It would be a lot safer to redo it in a more controlled way that's more likely to get you desirable
results. If you want, you could still try to salvage your current attempt too and compare the two precipitates to see if they look like the same
compound. |