-cyan- - 21-4-2007 at 14:42
Hiho,
Its maybe a stupid question, but, will it be possible to oxidize PH3 to white P with Fe(III)-salts? (potential of PH3-->P + 3H+ + 3 e- = -0,06V //
Fe3+ + 3 e- <--> Fe = -0,04V)
thx&greetz
guy - 21-4-2007 at 14:49
You need to consider Fe3+ + e- --> Fe2+ Eo= 0.74V
It will probably oxidize it all the way to phosphoric acid. Not best to do it in water.
-cyan- - 21-4-2007 at 14:52
do u have a suggestion how i could oxidize it only to P not to H3PO3 or H3PO4 ?
BromicAcid - 21-4-2007 at 16:30
I mention in the phosphorous thread, IIRC, that running phosphine through nickel <sup>2+</sup> salts leads to a nickel/phosphorus mixture
that may prove separateable (details were sparse as I remember) check through the thread for the exact quotation.
evil_lurker - 21-4-2007 at 18:28
Run the gas thru a tube heated up to 700-800ºC.
PH3 liberates H2... the reaction is irreversable.