Question

Fe-- FeCl2--Fe(OH)2--FeO--Fe--FeCl3--Fe(OH)3--Fe2(SO4)3

Answer 1

Fe + 2HCl = FeCl2 + H2
FeCl2 + 2NaOH = Fe(OH)2 + 2NaCl
Fe(OH)2 = FeO + H2O
FeO + H2 = Fe + H2O
2Fe + 3Cl2 = 2FeCl3
FeCl3 + 3KOH = Fe(OH)3 + 3KCl
2Fe(OH)3 + H2SO4 = Fe2(SO4)3 + H2O

Answer 2

The sequence you provided represents the transformation of iron (Fe) through various chemical reactions. Here's a breakdown of each step:

1. Fe: This represents elemental iron, which is the pure form of iron.

2. FeCl2: Iron reacts with chlorine gas (Cl2) to form iron(II) chloride (FeCl2). This compound contains iron in the +2 oxidation state.

3. Fe(OH)2: Iron(II) chloride (FeCl2) reacts with a base, such as sodium hydroxide (NaOH), to form iron(II) hydroxide (Fe(OH)2). This compound contains iron in the +2 oxidation state.

4. FeO: Iron(II) hydroxide (Fe(OH)2) undergoes dehydration to form iron(II) oxide (FeO). This compound contains iron in the +2 oxidation state.

5. Fe: Iron(II) oxide (FeO) can be further oxidized by oxygen in the air to convert it back to elemental iron (Fe).

6. FeCl3: Elemental iron (Fe) reacts with chlorine gas (Cl2) to form iron(III) chloride (FeCl3). This compound contains iron in the +3 oxidation state.

7. Fe(OH)3: Iron(III) chloride (FeCl3) reacts with a base, such as sodium hydroxide (NaOH), to form iron(III) hydroxide (Fe(OH)3). This compound contains iron in the +3 oxidation state.

8. Fe2(SO4)3: Iron(III) hydroxide (Fe(OH)3) can react with sulfuric acid (H2SO4) to form iron(III) sulfate (Fe2(SO4)3). This compound contains iron in the +3 oxidation state.

Please note that the oxidation states mentioned above are based on common reactions and may vary depending on specific conditions.