2[Ti(H2O)6]Cl3 + (NH3OH)Cl + 2HCl → 2[Ti(H2O)2Cl4] + NH4Cl + 9H2O
Hexaaquatitanium(III) chloride react with hydroxylammonium chloride and hydrogen chloride to produce tetrachloridodiaquatitanium(IV), ammonium chloride and water. Hydrogen chloride - concentrated solution.