• Source: Hexafluorophosphoric acid

Hexafluorophosphoric acid refers to a family of salts produced by combining phosphorus pentafluoride and hydrofluoric acid. The idealized chemical formula for hexafluorophosphoric acid
is HPF6, which also is written H[PF]6. Hexafluorophosphoric acid is only stable in solution, decomposing to HF and PF5 when dry. It exothermically reacts with water to produce oxonium hexafluorophosphate (H3OPF6) and hydrofluoric acid. Additionally, such solutions often contain products derived from hydrolysis of the P-F bonds, including HPO2F2, H2PO2F, and H3PO4, and their conjugate bases. Hexafluorophosphoric acid attacks glass. Upon heating, it decomposes to generate HF. Crystalline HPF6 has been obtained as the hexahydrate, wherein PF−6 is enclosed in truncated octahedral cages defined by the water and protons. NMR spectroscopy indicates that solutions derived from this hexahydrate contain significant amounts of HF.
Whereas a species with the formula HPF6 remains unknown, the analogous molecular hexafluoroarsenic acid (HAsF6) has been crystallized.




See also


Fluoroantimonic acid




References

Kata Kunci Pencarian:

• Hexafluorophosphoric acid
• Fluoroantimonic acid
• Perchloric acid
• Acid
• Hexafluorosilicic acid
• Fluoroboric acid
• Hexafluorophosphate
• Phosphorus pentafluoride
• Hexafluoroarsenate
• Balz–Schiemann reaction