Silver phosphate. From Wikipedia, the free encyclopedia. Not to be confused with Silver hexafluorophosphate. Silver phosphate Names IUPAC name ... The phosphate ion is a polyatomic ion with the empirical formula (PO 4)3− and a molar mass of 94.97 g/mol. It consists of one central phosphorus atom surrounded by four oxygen atoms in a tetrahedral arrangement. The phosphate ion carries a −3 formal charge and is the conjugate base of the hydrogen phosphate ion,...

Almost all alkali metal compounds and nitrates are soluble, but most silver compounds are insoluble (except for acetates, perchlorates, chlorates, and nitrates). Therefore, when the soluble salts silver nitrate and sodium chromate are mixed, insoluble silver chromate forms and precipitates out. The chemical formula for a phosphate ion is [PO4]3-. The formula indicates that one ion of phosphate contains one atom of phosphorus, represented by the P and four atoms of oxygen, symbolized by O4. The superscript 3- indicates that the ion carries a charge of -3.