4CrF2 + 12HCl + O2 + 14H2O → 4[Cr(H2O)4Cl2]Cl + 8HF
Chromium(II), fluoride react with hydrogen chloride, oxygen and water to produce dichloridotetraaquachromium(III) chloride and hydrogen fluoride. Hydrogen chloride - diluted solution. The reaction takes place in a boiling solution.