As far as I know, this is the first video on YouTube to showcase this particular compound!
Today I'm making Chevreul's Salt, which is a very interesting compound of copper. It is a brick red crystalline solid, which is unusual for copper compounds, and it is also a mixed-valence sulfite. This means that it has copper atoms in both the +1 and +2 oxidation states!
See my blog for more info and a writeup of this experiment: http://thehomescientist.blogspot.com/2013/10/chevruels-salt.html
