6VOCl2 + K2Cr2O7 + 2HCl → 6VO2Cl + 2CrCl3 + 2KCl + H2O
Vanadium dichloride oxide react with potassium dichromate and hydrogen chloride to produce vanadium dioxide-chloride, chromium(III) chloride, potassium chloride and water. Hydrogen chloride - diluted solution.