The correct name for P2O5 is diphosphorus pentoxide. In this compound, two phosphorus (P) atoms are bonded to five oxygen (O) atoms. The name reflects the number of each type of atom present in the molecule. “Di-” indicates two phosphorus atoms, and “penta-” indicates five oxygen atoms.
Diphosphorus pentoxide is commonly used in various applications, including as a dehydrating agent in the synthesis of phosphoric acids and in the manufacture of phosphate fertilizers. It’s important to note that the compound can also be considered as phosphorus(V) oxide due to the oxidation state of phosphorus being +5 in this compound.