Sciencemadness Discussion Board

Electrolysis of aqueous (NH4)2HPO4

rstar - 2-11-2012 at 20:06

Well i just thought of electrolysing that. Dont know what it will produce, but i guess its gonna make NH3 and H3PO4.

Can someone tell ?

Nicodem - 2-11-2012 at 23:26

Quote: Originally posted by rstar  
Can someone tell?

Hydrogen and oxygen?

rstar - 3-11-2012 at 07:00

equation ?

Eddygp - 3-11-2012 at 07:23

heating it (melting it) produces gaseous H3PO4 and NH3

UnintentionalChaos - 3-11-2012 at 07:39

Quote: Originally posted by Eddygp  
heating it (melting it) produces gaseous H3PO4 and NH3


H3PO4 does not evaporate. Melting causes loss of NH3 to form orthophosphoric acid. I remember reading a paper claiming that some of the ammonia remains trapped when monoammonium phosphate is melted. Likely, much more is trapped when diammonium phosphate is used instead

Nicodem - 3-11-2012 at 08:23

Quote: Originally posted by rstar  
equation ?

You don't know the water electrolysis equation and yet you want to perform it?

2 H2O -> 2 H2 + O2

Start with the wikipedia entry and then follow its references: Electrolysis of water

rstar - 3-11-2012 at 08:36

Quote: Originally posted by Nicodem  
Quote: Originally posted by rstar  
equation ?

You don't know the water electrolysis equation and yet you want to perform it?
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LOL
I was talking about electrolysis of Diammonium Phosphate solution.

Nicodem - 3-11-2012 at 08:37

Quote: Originally posted by rstar  
LOL
I was talking about electrolysis of Diammonium Phosphate solution.

Me too. Now go read that wikipedia entry!

vmelkon - 6-11-2012 at 08:12

I imagine at the cathode
2 NH4 + 2 e- --> 2 NH3 + H2

The hydrogen gas would easily escape while the ammonia would stay dissolved in the water and turn back into the ammonium ion.
I'm not sure what would have to the HPO4- ion at the anode.