Write the equation: Fe – Fe2O3 – FeCL3 – Fe (OH) 2 – Fe2 (SO4) 3

1) 4Fe + 3O2 → 2Fe2O3 (iron (III) oxide; compound reaction).

2) Fe2O3 + 6HCl → 2FeCl3 + 3H2O (iron (III) chloride; exchange reaction, the reaction proceeds, since a weak electrolyte is formed in the form of water).

3) It is impossible to obtain iron (II) hydroxide from iron (III) chloride in one stage.

FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl (iron (III) hydroxide, sodium chloride; exchange reaction, the reaction proceeds, since a precipitate is formed in the form of iron (III) hydroxide).

4) 2Fe (OH) 3 + 3H2SO4 → Fe2 (SO4) 3 + 6H2O (iron (III) sulfate; the reaction is exchange, the reaction proceeds, since a weak electrolyte is formed in the form of water).