Write the reaction equation: Fe → FeCl2 → Fe (No3) 2 → Fe (OH) 2 → FeO

1) Iron reacts with chlorine, we get iron (II) chloride:

Fe + Cl2 → FeCl2;

2) Iron (II) chloride reacts with nitric acid and forms – iron (II) nitrate and hydrochloric acid:

FeCl2 + 2HNO3 → Fe (NO3) 2 + 2HCl;

3) Iron (II) nitrate interacts with sodium hydroxide and it turns out – iron (II) hydroxide and sodium nitrate:

Fe (NO3) 2 + 2NaOH → Fe (OH) 2 ↓ + 2NaNO3;

4) Iron (II) oxide decomposes into iron (II) oxide and water:

Fe (OH) 2 → FeO + H2O.