Maxxx wrote:Hey BPR 2011
Your chemistry is way better than mine,
It does clean the copper well (and stainless) it gives off plenty of oxygen in the process.
I normally just rinse well no acid required.
You have peaked my interest witH the neo magnets though- how were you thinking of using them
Cheers
Max
Hey Max,.
Chromium itself is antiferromagnetic below 38C (paramagnetic above that, no good), so it will actually somewhat become part of a strong magnetic field (weakly though), so a cooled chromium containing solution with a very strong magnet teabag should gather some chromium on its' own.
There is a process to make Chromium magnetic though:
First you need CrO3 (see below), then you need to run the reaction to 526.85C at 2000 bar pressure in water (so easy right?) 3CrO3 + Cr2O3 -> 5CrO2 + O2
CrO3 can be formed by 2Cr + 3O2 -> 2CrO3
Tongue is in cheek :D
I'm going to try and soak just it out in a weak acid (citric, low concentration acetic), and put a few teabags of really strong bag of rare earth magnets near the surface to see what I get whilst it cools to our winter over night temperatures.
There is also the "eat the metal method" though.
2Cr (Chromium Metal) + 6HCl (Hydrochloric Acid) -> 2CrCl3 (Chromium(III) chloride) + 3H2 (Hydrogen) [Redox reaction, Single displacement (substitution) reaction]
Chromium(III) chloride is water soluble, but Captain Planet will turn you into a tree if you flush it down the drain.
So Chromium teabag with super strong magnets first, then there's always HCl for the cleanup, but take out the copper or you will produce Cu + 2HCl = CuCl2 (Copper(II) chloride, water soluble) + H2.
Then, treating the CrCl3 with a few options. Bad ones and good ones (try and avoid equalibrium reactions). 2CrCl3 + H2O2 -> 2CrCl2 + 2HCl + O2
But again, I'm trying to teabag method as soon as my magnets arrive first.