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Concentrated solutions of H3PO4(aq) are used as electrolytes in fuel cells operating typically at temperatures from 425 to 550 K. Phosphate ions, as water softeners and buffering agents, can be present in power cycles where temperatures may reach beyond the critical point of water.
Formula: H 3 O 4 P. Molecular weight: 97.9952. IUPAC Standard InChI:InChI=1S/H3O4P/c1-5 (2,3)4/h (H3,1,2,3,4) Copy. IUPAC Standard InChIKey:NBIIXXVUZAFLBC-UHFFFAOYSA-N Copy. CAS Registry Number: 7664-38-2.
When the concentration of acid rises above 62.5% the freezing-point increases, reaching 21°C by 85% H 3 PO 4 (w/w; the monohydrate). Beyond this the phase diagram becomes complicated, with significant local maxima and minima.
Concentrated solutions of H3PO4 (aq) are used as electrolytes in fuel cells operating typically at temperatures from 425 to 550 K. Phosphate ions, as water softeners and buffering agents, can be present in power cycles where temperatures may reach beyond the critical point of water.
6 Αυγ 2020 · Phosphoric Acid Profile. Molar mass: 97.994 g/mol. Appearance: Thick, colorless liquid. Boiling point: 485 K or 212 °C. 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.
Boiling Point: 158 C (85% aq) Density: 1.685 g/mL (85% aq) The most common form of phosphoric acid (H3PO4) is the 85% aqueous form. Pure anhydrous phosphoric acid is a white solid with a melting point of 42 C. Phosphoric acid has three pKa values covering a wide range (pKa's: 2.15, 7.20, 12.32).
29 Ιουλ 2024 · This boiling point calculator tells you how to calculate the boiling point of most common substances at an arbitrary pressure, based on the Clausius–Clapeyron relation. Whether you want to analyze water, ethanol, or ammonia, simply provide some reference values, and this calculator will do the work for you.
