Iron(II) Phosphate Fe3(PO4)2 Molecular Weight — EndMemo.Click to see full answer. Also asked, what is the correct formula for Iron II phosphate?The chemical formula for iron(II) phosphate is Fe3 (PO4)2.Also Know, is fe3 po4 2 soluble? Iron(II) phosphate Names Melting point 180 °C (356 °F; 453 K) (octahydrate) decomposes Solubility in water insoluble Structure Crystal structure monoclinic (octahydrate) Herein, what is the molecular weight of fe3 po4 2? 357.48 g/mol What is the percent composition of iron II phosphate? Percent composition by element Element Symbol Mass Percent Iron Fe 46.866% Oxygen O 35.805% Phosphorus P 17.329%