Electrolysis of a solution in hydrofluoric acid gives cobaltic fluoride, CoF3.
It may be prepared by the action of hydrofluoric acid upon lime, as directed under Barium, Fluoride of.
The preparation of fluorine was finally accomplished by the French chemist Moissan by the electrolysis of hydrofluoric acid.
Cupric fluoride, CuF2, is obtained by dissolving cupric oxide in hydrofluoric acid.
Acids do not act upon it, except the hydrofluoric; fused with nitre, it forms chromate of potassa.
