Respuesta :
Answer: The chemical equations are given below.
Explanation:
- For a: Fe is heated in an atmosphere of steam.
The chemical equation follows:
[tex]3Fe(s)+4H_2O(g)\rightarrow Fe_3O_4(s)+4H_2(g)[/tex]
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.
- For b: NaOH is added to a solution of [tex]Fe(NO_3)_3[/tex]
The chemical equation follows:
[tex]Fe(NO_3)_3+3NaOH\rightarrow Fe(OH)_2+3NaNO_3[/tex]
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.
- For c: [tex]FeSO_4[/tex] is added to an acidic solution of [tex]KMnO_4[/tex]
The chemical equation follows:
[tex]10FeSO_4+2KMnO_4+8H_2SO_4\rightarrow 5Fe_2(SO_4)_3+K_2SO_4+2MnO_4+8H_2O[/tex]
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.
- For d: Fe is added to a dilute solution of [tex]H_2SO_4[/tex]
The chemical equation follows:
[tex]Fe+H_2SO_4\rightarrow FeSO_4+H_2[/tex]
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.
- For e: A solution of [tex]Fe(NO_3)_2[/tex] and [tex]HNO_3[/tex] is allowed to stand in air.
The chemical equation follows:
[tex]3Fe(NO_3)_2+4HNO_3\rightarrow 3Fe(NO_3)_3+NO+H_2O[/tex]
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.
- For f: [tex]FeCO_3[/tex] is added to a solution of [tex]HClO_4[/tex]
The chemical equation follows:
[tex]FeCO_3+2HClO_4\rightarrow Fe(ClO_4)_2+CO_2+H_2O[/tex]
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.
- For g: Fe is heated in air
The chemical equation follows:
[tex]2Fe+O_2\rightarrow 2FeO[/tex]
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.
