Hydrogen hexafluorophosphate (V)

Hexafluorophosphate
Hexafluorophosphate
Are common
Systematic ; name	Hydrogen hexafluorophosphate (V)
Traditional names	Hexafluorophosphoric acid
Chem. formula	H [PF 6 ]
Physical properties
condition	white crystals
Molar mass	145.97 g / mol
Thermal properties
T. melt.	hydr. 32 ° C
Classification
Reg. CAS number	16940-81-1
PubChem
Reg. EINECS number
Smiles
Inchi
Reg. EC number	241-006-5
ChemSpider

Hydrogen hexafluorophosphate (V) is an inorganic compound, a complex phosphorus and hydrogen fluoride with the formula H [PF ₆ ], white crystals, soluble in water, form a crystalline hydrate .

Content

Getting

Passing hydrogen fluoride through a solution of phosphorus pentafluoride in carbon disulfide :

{\mathsf {PF_{5}+HF\ {\xrightarrow {-20^{o}C}}\ H[PF_{6}]}}

{\ displaystyle {\ mathsf {PF_ {5} + HF \ {\ xrightarrow {-20 ^ {o} C}} \ H [PF_ {6}]}}}

As one of the products of the action of hydrofluoric acid on phosphorus oxide :

{\mathsf {P_{4}O_{10}+HF\ {\xrightarrow[{-H_{2}O}]{HF(40\%)}}\ H[PF_{6}],H[PO_{2}F_{2}],H_{2}[PO_{3}F]}}

{\ displaystyle {\ mathsf {P_ {4} O_ {10} + HF \ {\ xrightarrow [{- H_ {2} O}] {HF (40 \%)}} \ H [PF_ {6}], H [PO_ {2} F_ {2}], H_ {2} [PO_ {3} F]}}}

Physical Properties

Hydrogen hexafluorophosphate (V) forms white crystals soluble in water. It forms crystalline hydrate H [PF ₆ ] • 6 H ₂ O. It is a strong acid.

Chemical Properties

Crystalline hydrate decomposes upon heating:

{\mathsf {H[PF_{6}]\cdot 6H_{2}O\ {\xrightarrow {150-200^{o}C}}\ POF_{3}+3HF+3H_{2}O}}

{\ displaystyle {\ mathsf {H [PF_ {6}] \ cdot 6H_ {2} O \ {\ xrightarrow {150-200 ^ {o} C}} \ POF_ {3} + 3HF + 3H_ {2} O} }}

It decomposes by hot water in an acidic environment:

{\mathsf {2H[PF_{6}]+5H_{2}O\ {\xrightarrow {H_{+},100^{o}C}}\ H[PO_{2}F_{2}]+H_{2}[PO_{3}F]+9HF}}

{\ displaystyle {\ mathsf {2H [PF_ {6}] + 5H_ {2} O \ {\ xrightarrow {H _ {+}, 100 ^ {o} C}} \ H [PO_ {2} F_ {2}] + H_ {2} [PO_ {3} F] + 9HF}}}

With alkali forms fluorophosphate salts:

{\mathsf {H[PF_{6}]+NaOH\ {\xrightarrow {}}\ Na[PF_{6}]+H_{2}O}}

{\ displaystyle {\ mathsf {H [PF_ {6}] + NaOH \ {\ xrightarrow {}} \ Na [PF_ {6}] + H_ {2} O}}}

Application

Literature

Chemical Encyclopedia / Editorial: Zefirov N.S. et al. - M .: Big Russian Encyclopedia, 1998. - V. 5. - 783 p. - ISBN 5-85270-310-9 .
Lidin R. A. , Andreeva L. L. , Molochko V. A. Chemical properties of inorganic substances: Textbook. manual for universities - 3rd ed., Rev. - M .: Chemistry , 2000. - 480 p. - ISBN 5-7245-1163-0
<a href=" https://wikidata.org/wiki/Track:Q52153739 "> </a> <a href=" https://wikidata.org/wiki/Track:Q52153731 "> </a> <a href = " https://wikidata.org/wiki/Track:Q52153729 "> </a> <a href=" https://wikidata.org/wiki/Track:Q52153728 "> </a> <a href = " https://wikidata.org/wiki/Track:Q52153736 "> </a>

Hexafluorophosphate
Are common
Systematic name	Hydrogen hexafluorophosphate (V)
Traditional names	Hexafluorophosphoric acid
Chem. formula	H [PF ₆ ]
Physical properties
condition	white crystals
Molar mass	145.97 g / mol
Thermal properties
T. melt.	hydr. 32 ° C
Classification
Reg. CAS number	16940-81-1
PubChem
Reg. EINECS number
Smiles
Inchi
Reg. EC number	241-006-5
ChemSpider