FadeToBlackened - 18-5-2003 at 12:36
I've read that this can be done by heating it, but how much heat does it take? Would charcoal + lots of air do it or would it take a high
current carbon-arc type setup?
madscientist - 18-5-2003 at 13:17
I once attempted to reduce MgSO<sub>4</sub> with charcoal (both powders, intimately mixed) in a charcoal fire. Nothing much seemed to
happen.
[Edited on 18-5-2003 by madscientist]
Thermite?
Theoretic - 30-6-2003 at 04:24
Theoretically, Al powder would react with CaSO4 quite exothermically. SO4-- is more oxidizing than S.
rikkitikkitavi - 1-7-2003 at 05:53
CaSO4 can be reduced with C , but it takes about 13-1400 C, wich is unobtainable in a simple charcoal fire, unless it is very large. Heat loss
compared to combustion rate is unfavourable in most fires that we can construct in the lab or in a garden.
An arc oven (with graphite electrodes ) would probably work.
/rickard