[Sturm88]

Phosphorous in a Fertilizer

"P205" (cited by manufacturer) --> (NH4)H2PO4 (actual fertilizer) --> MgNH4PO4.6H2O (product)

So P2O5 apparently isn't the actual phosphorous in fertilizer it's ammonium dihydrogen phosphate.

If I have 1 gram of the fertilizer (MgNH4PO4.6H20) initially what's the equivalence mass of the imaginary "P2O5"

I've thought about it and I'm a little confused. Not sure what to use.

Since there are two hydrogens in the actual fertilizer and 2P's in the phosporic acid... I have tried this.

MolarMass of P2O5 / 2 for equivalence mass... but I'm not sure if that's what is needed to be done.

[Borek]

Try to write reaction of fertilizer "synthesis" that starts with P₂O₅. Something like CaO + P₂O₅, where there is obviously 141.9 g of P₂O₅ in 321.2 g of Ca₃(PO₄)₂.