... Fe(OH) 3 (r) + 3NaCl (d d) (6 )2Fe(OH) 3 (r) + 3H2SO4 (d d) → Fe2(SO4) 3 (d d) + 3H2O(l) (7 ) Fe2(SO4) 3 (d d) + 3BaCl2 (d d) → 3BaSO4 (r) + 2FeCl 3 (d d) (8 )0,50,50,50,50,50,50,50,5II ... H2SO4 (d d) (3 ) H2SO4 (d d) + BaCl2 (d d) → BaSO4 (r) + 2HCl (d d) (4 )Fe2O 3( r) + 6HCl (d d) → 2FeCl 3 (d d) + 3H2O(l) (5 )FeCl 3 (d d) + 3NaOH(d d) → Fe(OH) 3 (r) ... (r)Ba(OH)2 (dd) + K2CO 3 (dd) BaCO 3 (r) + KOH (dd) Ba(OH)2 (dd) + MgSO4 (dd) Mg(OH)2 (r) + BaSO4 (r) K2CO 3 (dd) + MgSO4 (dd) MgCO 3 (r) + K2SO4 (dd)0,750,25 0,20,20,20,22Nguyễn...