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Potassium bifluoride

Potassium bifluoride is the inorganic compound with the formula . This colourless salt consists of the potassium cation () and the bifluoride anion (). The salt is used as an etchant for glass. Sodium bifluoride is related and is also of commercial use as an etchant as well as in cleaning products.

Synthesis and reactions

The salt was prepared by Edmond Frémy by treating potassium carbonate or potassium hydroxide with hydrofluoric acid: : With one more equivalent of HF, (CAS RN 12178-06-2, m.p. 71.7 °C) is produced: :

Thermal decomposition of gives hydrogen fluoride: :

Applications

The industrial production of fluorine entails the electrolysis of molten and . The electrolysis of was first used by Henri Moissan in 1886.

References

(June 1949). "Thermodynamics of the System KHF2-KF-HF, Including Heat Capacities and Entropies of KHF2, and KF. The Nature of the Hydrogen Bond in KHF2". J. Am. Chem. Soc..
"Potassium bifluoride".
(2000). "Fluorine Compounds, Inorganic".
Ažman, A.. (1967-06-15). "Infrared spectra of KH₂F₃ and the structure of the H₂F₃⁻ ion". Canadian Science Publishing.

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inorganic-compounds potassium-compounds metal-halides bifluorides alkali-metal-fluorides

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