Pls ajutor Am nevoie urgent

8). a = NaOH => 2NaOH + FeCl2 = Fe(OH)2 + 2NaCl
9) a = NaOH => 3NaOH + FeCl3 = Fe(OH)3 + 3NaCl
10). CaCO3 = CaO + Co2
11). e = H2O cred?? => CaO + H2O = Ca(OH)2
12). Ca(OH)2 + CO2 = CaCO3 + H2O