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It is not possible to fully dehydrate phosphoric acid to phosphorus pentoxide, instead the polyphosphoric acid becomes increasingly polymeric and viscous. Due to the self-condensation, pure orthophosphoric acid can only be obtained by a careful fractional freezing/melting process.
Phosphoric acid, H 3 PO 4 (orthophosphoric acid), is a white crystalline substance which melts at 108 ° F (42 ° C). It is most commonly found in aqueous form (dissolved in water), where it forms a colorless, thick liquid.
Pure phosphoric acid is a crystalline solid (melting point 42.35° C, or 108.2° F); in less concentrated form it is a colourless syrupy liquid. The crude acid is prepared from phosphate rock, while acid of higher purity is made from white phosphorus.
Phosphoric acid. Molecular formula: H 3 O 4 P. Average mass: 97.994. Monoisotopic mass: 97.976895. ChemSpider ID: 979.
Pure anhydrous phosphoric acid is a white solid that melts at 42.35 °C to form a colorless, viscous liquid. Most people and even chemists refer to orthophosphoric acid as phosphoric acid, which is the IUPAC name for this compound.
Chemical Compound Formulas. Phosphoric Acid. Orthophosphoric Acid - H3PO4 (Phosphoric Acid) What is Phosphoric Acid? Orthophosphoric acid refers to phosphoric acid. Phosphoric Acid is a weak acid with the chemical formula H 3 PO 4. Phosphoric Acid is an acid-containing four atoms of oxygen, one atom of phosphorus, and three atoms of hydrogen.
Melting point: 315.5 K or 42.35 °C (of crystalline solid) Dynamic viscosity: 2.4 to 9.4 centipoise (85% aqueous solution) Density: 1.83 g/cm 3 (solid); 1.68 g/cm 3 (85% aqueous solution at 25 °C) Structure. The H3PO4 Lewis structure. The H 3 PO 4 compound has a total of 32 valence electrons.
Phosphoric Acid is a triprotic acid, meaning it can donate three hydrogen ions (H⁺) in reactions. This property makes it an effective acid for adjusting the acidity in food and beverages. Equation : H₃PO₄ → H⁺ + H₂PO₄⁻
navigation search. Phosphoric acid is a mid-strength mineral acid having the chemical formula H3PO4 that is more correctly called orthophosphoric acid, to distinguish it from other phosphate-containing acids. Orthophosphoric acid is a relatively non-toxic acid, which, when pure, is a solid at room temperature and pressure.
Phosphoric acid melting point. The melting point of phosphoric acid is 42.35°C (108.23°F). This is the temperature at which the solid phase of phosphoric acid will convert to a liquid phase.