View single post by steve of oxford | ||||||||||
Posted: Wed May 30th, 2012 00:46 |
|
|||||||||
steve of oxford
|
Constable wrote:I don't think so. No it's oxide by pyrolysis in the case of heating the nitrate crystals, or, I suspect a kind of slow pyrolysis by leaving the crystals in the sun. Slowly reacted with the oxygen in the air, basically. Here's from wiki; The red form of HgO can be made by heating Hg on oxygen at roughly 350 °C, or by pyrolysis of Hg(NO3)2. Moreover, heating the Hg(NO3)2 crystals causes them to melt, thus driving out any water, then the liquid crystal dries up and goes orange....because it's oxidized. I think the same thing has happened to the crystals I left in the sun, although the weaker colour suggests that not as much oxygen has been reacted with. Last edited on Wed May 30th, 2012 00:49 by steve of oxford |
|||||||||
|