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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.
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.
1 Φεβ 2007 · Densities and heat capacities of aqueous arsenious and arsenic acid solutions to 350 °C and 300 bar, and revised thermodynamic properties of As (OH)3∘ (aq), AsO (OH)3∘ (aq) and iron ...
11 Ιαν 2007 · The densities and heat capacities of solutions of phosphoric acid, 0.05 to 1 mol kg-1, were measured using flow vibrating tube densitometry and differential Picker-type calorimetry at temperatures up to 623 K and at pressures up to 28 MPa.
Solution A — dissolve 40 g ammonium molybdate tetrahydrate in 400 ml hot water and cool to room temperature. Solution B — dissolve 2 g ammonium metavanadate in 250 ml hot deionized water. Cool to room temperature and add 330 ml of concentrated (36%) hydrochloric acid. Cool to room temperature.
The iso-corrosion diagram 0.1mm/year lines are represented for the 304 (light blue) and 316 (dark blue) types and show that the 304 types should be satisfactory up to acid’s boiling point to around 25% concentration.
25 Μαρ 2021 · The acid has a boiling point of 300 o C at 760 mmHg; The acid has a density of 2.0g g/ml at 25 o C; Molecular weight of polyphosphoric acid is 98.0; It is synthesized by reacting phosphoric acid with phosphorous (V) oxide. Polyphosphoric acid is weaker than sulphuric acid and nitric acid and has no oxidizing power. Reactivity Profile Of ...
