Potassium fluorochromate

Potassium fluorochromate
Potassium fluorochromate
Are common
Systematic ; name	Potassium fluorochromate
Traditional names	Potassium trioxofluorochromate (VI)
Chem. formula	KCrO 3 F
Physical properties
condition	red crystals
Molar mass	158.09 g / mol

Potassium fluorochromate is an inorganic compound, a salt of potassium and fluorochrome acid with the formula KCrO ₃ F, red crystals, it dissolves in water with decomposition.

Content

Getting

The reaction of potassium dichromate with an excess of hot dilute hydrofluoric acid:

{\mathsf {K_{2}Cr_{2}O_{7}+2HF\ {\xrightarrow {T}}\ 2KCrO_{3}F+H_{2}O}}

{\ displaystyle {\ mathsf {K_ {2} Cr_ {2} O_ {7} + 2HF \ {\ xrightarrow {T}} \ 2KCrO_ {3} F + H_ {2} O}}}

Physical Properties

Potassium fluorochromate forms red crystals of tetragonal syngony , space group I 4 ₁ / a , cell parameters a = 0.546 nm, c = 1.289 nm? Z = 4.

Slowly destroys glass.

Chemical Properties

It decomposes in hot water:

{\mathsf {2KCrO_{3}F+H_{2}O\ {\xrightarrow {T}}\ K_{2}Cr_{2}O_{7}+2HF}}

{\ displaystyle {\ mathsf {2KCrO_ {3} F + H_ {2} O \ {\ xrightarrow {T}} \ K_ {2} Cr_ {2} O_ {7} + 2HF}}}

Literature

Ryss I.G. Chemistry of fluorine and its inorganic compounds. - 1956. - 722 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.