4P+5O2--->2P2O5
P2O5+3H2O--->2H3PO4
H3PO4+3NaOH--->Na3PO4+3H2O
2Na3PO4+3Ag2SO4---->2Ag3PO4+3Na2SO4
2H3PO4+3Ca(OH)2---->CaHPO4+6H2O
https://i.imgur.com/iSX1Gdm.jpg
4P+5O2--->2P2O5
P2O5+3H2O--->2H3PO4
H3PO4+3NaOH--->Na3PO4+3H2O
2Na3PO4+3Ag2SO4---->2Ag3PO4+3Na2SO4
2H3PO4+3Ca(OH)2---->CaHPO4+6H2O