2Сr + 6HCl = 2CrCl3 + 3H2
CrCl3 + 3NaOH = Cr(OH)3 + 3NaCl
2Cr(OH)3 +3 H2SO4 = Cr2(SO4)3 + 6H2O
Cr2(SO4)3 + 3Zn = 3ZnSO4 + 2Cr
2Сr + 6HCl = 2CrCl3 + 3H2
CrCl3 + 3NaOH = Cr(OH)3 + 3NaCl
2Cr(OH)3 +3 H2SO4 = Cr2(SO4)3 + 6H2O
Cr2(SO4)3 + 3Zn = 3ZnSO4 + 2Cr