johncena - 28-12-2015 at 12:00
Hello everyone! I found I have had an old dead car battery which is labeled Calcium-Calcium. First, I opened the top cap of the battery, used a
syringe to take some of the liquid ( I collected about 50 mls in around 1 min.). I poured it over NaHCO3 and NaCl and reactios took place in both
cases. Then I brought it to a boil with the idea to concentrate it. I was expecting this, but something weird happened - the liquid evaporated and I
was left with a white solid on the bottom of the beaker. I have no idea why this happened, so that's why I'm asking here.
P.S. I did this on a normal hotplate, without any special chambers or distillations.
[Edited on 28-12-2015 by johncena]
vmelkon - 28-12-2015 at 12:13
Yes, I have had that result as well.
Solubility of PbSO4 is = 0.00443 g/100 mL (20 °C)
Solubility of CaSO4 is = 0.24 g/100ml (20 °C)
johncena - 28-12-2015 at 13:23
So is there a way of cleaning it? Maybe a kind of a distillation or..?
[Edited on 28-12-2015 by johncena]
vmelkon - 28-12-2015 at 13:52
I would require vacuum distillation to distill the sulfuric acid itself.
Doing it at atmospheric pressure causes the H2SO4 to break down into SO2.
Also, you have to start with distillation at 1 atm to distill away most of the water and old car battery acid has a lot of water.