<u>Answer:</u> The chemical equations are given below.
<u>Explanation:</u>
- <u>For a:</u> Fe is heated in an atmosphere of steam.
The chemical equation follows:
![3Fe(s)+4H_2O(g)\rightarrow Fe_3O_4(s)+4H_2(g)](https://tex.z-dn.net/?f=3Fe%28s%29%2B4H_2O%28g%29%5Crightarrow%20Fe_3O_4%28s%29%2B4H_2%28g%29)
By Stoichiometry of the reaction:
3 moles of iron reacts with 4 moles of steam to produce 1 mole of iron (II,III) oxide and 4 moles of hydrogen.
- <u>For b:</u> NaOH is added to a solution of
![Fe(NO_3)_3](https://tex.z-dn.net/?f=Fe%28NO_3%29_3)
The chemical equation follows:
![Fe(NO_3)_3+3NaOH\rightarrow Fe(OH)_2+3NaNO_3](https://tex.z-dn.net/?f=Fe%28NO_3%29_3%2B3NaOH%5Crightarrow%20Fe%28OH%29_2%2B3NaNO_3)
By Stoichiometry of the reaction:
1 mole of iron nitrate reacts with 3 moles of sodium hydroxide to produce 1 mole of iron hydroxide and 3 moles of sodium nitrate.
- <u>For c:</u>
is added to an acidic solution of ![KMnO_4](https://tex.z-dn.net/?f=KMnO_4)
The chemical equation follows:
![10FeSO_4+2KMnO_4+8H_2SO_4\rightarrow 5Fe_2(SO_4)_3+K_2SO_4+2MnO_4+8H_2O](https://tex.z-dn.net/?f=10FeSO_4%2B2KMnO_4%2B8H_2SO_4%5Crightarrow%205Fe_2%28SO_4%29_3%2BK_2SO_4%2B2MnO_4%2B8H_2O)
By Stoichiometry of the reaction:
10 moles of iron(II) sulfate reacts with 2 moles of potassium permangante and 8 moles of sulfuric acid to produce 5 moles of iron(III) sulfate, 1 mole of potassium sulfate, 2 moles of manganese oxide and 8 moles of water.
- <u>For d:</u> Fe is added to a dilute solution of
![H_2SO_4](https://tex.z-dn.net/?f=H_2SO_4)
The chemical equation follows:
![Fe+H_2SO_4\rightarrow FeSO_4+H_2](https://tex.z-dn.net/?f=Fe%2BH_2SO_4%5Crightarrow%20FeSO_4%2BH_2)
By Stoichiometry of the reaction:
1 mole of iron reacts with 1 mole of sulfuric acid to produce 1 mole of iron sulfate and 1 mole of hydrogen gas.
- <u>For e:</u> A solution of
and
is allowed to stand in air.
The chemical equation follows:
![3Fe(NO_3)_2+4HNO_3\rightarrow 3Fe(NO_3)_3+NO+H_2O](https://tex.z-dn.net/?f=3Fe%28NO_3%29_2%2B4HNO_3%5Crightarrow%203Fe%28NO_3%29_3%2BNO%2BH_2O)
By Stoichiometry of the reaction:
3 moles of iron(II) nitrate reacts with 4 moles of nitric acid to produce 3 moles of iron(III) nitrate, 1 mole of nitric oxide and 1 mole of water.
- <u>For f:</u>
is added to a solution of ![HClO_4](https://tex.z-dn.net/?f=HClO_4)
The chemical equation follows:
![FeCO_3+2HClO_4\rightarrow Fe(ClO_4)_2+CO_2+H_2O](https://tex.z-dn.net/?f=FeCO_3%2B2HClO_4%5Crightarrow%20Fe%28ClO_4%29_2%2BCO_2%2BH_2O)
By Stoichiometry of the reaction:
1 mole of iron(II) carbonate reacts with 2 moles of perchloric acid to produce 1 moles of iron(II) perchlorate, 1 mole of carbon dioxide and 1 mole of water.
- <u>For g:</u> Fe is heated in air
The chemical equation follows:
![2Fe+O_2\rightarrow 2FeO](https://tex.z-dn.net/?f=2Fe%2BO_2%5Crightarrow%202FeO)
By Stoichiometry of the reaction:
2 moles of iron reacts with 1 mole of oxygen gas to produce 2 moles of iron(II) oxide.
Hence, the chemical equations are given above.