2KCr(SO4)2 + 12H2O + 6HCl → 2[Cr(H2O)6]Cl3 + K2SO4 + 3H2SO4
Chromium(III)-potassium sulfate react with water and hydrogen chloride to produce hexaaquachromium(III) chloride, potassium sulfate and sulfuric acid. This reaction takes place at a temperature of 0-10°C.