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Hydrogen fluoride does not boil until 20 °C in contrast to the heavier hydrogen halides, which boil between −85 °C (−120 °F) and −35 °C (−30 °F). [6] [7] [8] This hydrogen bonding between HF molecules gives rise to high viscosity in the liquid phase and lower than expected pressure in the gas phase.
Hydrogen bonding amongst HF molecules gives rise to high viscosity in the liquid phase and lower than expected pressure in the gas phase. Hydrogen fluoride does not boil until 20 °C in contrast to the heavier hydrogen halides which boil between −85 °C and −35 °C (−120 °F and –30 °F).
Hydrogen fluoride, HF, a diatomic compound which can dissolve in water to form hydrofluoric acid, a highly corrosive solution Hydrofluoric acid , HF (aq) , a solution of hydrogen fluoride (HF) in water
Hydrogen cyanide – HCN; Hydrogen fluoride – HF; Hydrogen peroxide – H 2 O 2; Hydrogen selenide – H 2 Se; Hydrogen sulfide – H 2 S; Hydrogen telluride – H 2 Te; Hydroxylamine – NH 2 OH; Hypobromous acid – HBrO; Hypochlorous acid – HClO; Hypophosphorous acid – H 3 PO 2; Metaphosphoric acid – HPO 3; Protonated molecular ...
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Blue type items have an article available by clicking on the name. Name Formula Boiling pt (°C) ... Hydrogen: H 2: −252.879 −259.16 2 ... Hydrogen fluoride: HF ...
In dilute aqueous solution hydrogen fluoride behaves as a weak acid, [10] Infrared spectroscopy has been used to show that, in solution, dissociation is accompanied by formation of the ion pair H 3 O + ·F −. [11] [12] H 2 O + HF ⇌ H 3 O + ⋅F − pK a = 3.17. This ion pair has been characterized in the crystalline state at very low ...
Elemental fluorine and virtually all fluorine compounds are produced from hydrogen fluoride or its aqueous solution, hydrofluoric acid. Hydrogen fluoride is produced in kilns by the endothermic reaction of fluorite (CaF 2) with sulfuric acid: [169] CaF 2 + H 2 SO 4 → 2 HF(g) + CaSO 4. The gaseous HF can then be absorbed in water or liquefied ...