3HCl + Cr(OH)3 -> CrCl3 + 3H2O2CrCl3 -> Cr2O3 + 3Cl2CrCl3 + 3H2SO4 -> Cr2(SO4)3 + 3HClCr2(SO4)3 + 6NaOH -> 2Cr(OH)3 + 3Na2SO4
3HCl + Cr(OH)3 -> CrCl3 + 3H2O
2CrCl3 -> Cr2O3 + 3Cl2
CrCl3 + 3H2SO4 -> Cr2(SO4)3 + 3HCl
Cr2(SO4)3 + 6NaOH -> 2Cr(OH)3 + 3Na2SO4