ferrous sulphate

[Bashar]

This is some interesting reading for producing ferrous sulfate crystals.

http://www.crscientific.com/ferroussulfate.html

It looks to be a bit of a balancing act managing temperature, pH, and oxygen.

Good tip Irons, thanks, I did not Know the plastic would breathe, and allow in air, I will use glass, from now on.

I suppose the reason my ferrous sulfate crystals do not oxidize is they remain acidic, still wet, as I do not dry them to completion, and there is still some thick clear green acidic liquid above them.

i done my gold powdering in ferrous sulfate but it is in brown colour , how can it nake shine and yellow powder. If any know its washing procedure

 

[4metals]

Gold precipitated is typically a brown color. Likely due to particle size. When fire assaying the parted gold often looks like coffee grinds when it is dried even though it is at least 99.9% fine. If you anneal the gold by heating it until it glows it will look bright. Of course if there are impurities in the gold you precipitated it may still appear dirty.