... H2 (A1) (A2) (A3) (A4) FeCl2 + 2NaOH → Fe(OH)2 + 2NaCl (A3) (A5) (A6) (A7)0,250,250,250.250.25 4 Fe(OH)2 + 2 H2O + O2 → 4 Fe(OH)3 (A6) (A8) (A9) ... (A9) (A10) 2 Fe(OH)3 →ot Fe2O3 + 3 H2O (A10) (A11) (A8) Fe2O3 + 3 H2 →ot2 Fe + 3 H2O (A11) (A4) (A1) (A8) 0.250.250.25Câu 4 (2 .đ) ... %0,250,250,250,250,250,250,250,25Câu 5 (2 đ) PT: Ba + 2H2O → Ba(OH)2 + H2 (1 )Ba(OH)2 + CuSO4 → Cu(OH)2 ↓ + BaSO4 ↓ (2 ) Ba(OH)2 + (NH4)2SO4 → BaSO4 ↓ + 2NH3 + 2H2O (3 ) Cu(OH)2...