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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.
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.
30 Νοε 2022 · Use the boiling point calculator to find the boiling point at a given pressure for different substances such as water, hydrogen, methane, or others. To make use of this tool: Select the substance that you're interested in studying.
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.
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.
It can be conveniently prepared by dissolving P 2 O 5 in water followed by boiling the solution to form a thick syrup. P 2 O 5 + 3H 2 O ⇌ 2H 3 PO 4 Red phosphorus when heated with conc. HNO 3 yields orthophosphoric acid.
