Question

FeS2>Fe(OH)2>Fe2(SO4)3>Fe(NO3)3>Fe3O3

Answer 1

Відповідь:

FeS2 + 2 NaOH → 2 NaS + Fe(OH)2

2Fe(OH)2 + 4H2SO4(конц!) → Fe2(SO4)3 + 6H2O + SO2

Fe2(SO4)3 + 3Ba(NO3)2 → 2Fe(NO3)3 + 3BaSO4↓

3Fe(NO3)3 → Fe3O3 + 9NO2 + 3O2  

Пояснення:

Answer 2

It looks like you've provided a sequence of chemical compounds involving iron (Fe) and different elements (Sulfur, Oxygen, and Hydrogen) in various oxidation states and configurations. This sequence seems to suggest a comparison of the stability or reactivity of these compounds. Let's break down the compounds and their properties:

1. FeS2 (Iron disulfide, Pyrite): This is a naturally occurring mineral commonly known as fool's gold. It consists of iron and sulfur. Pyrite is relatively stable and does not readily react with water or air.

2. Fe(OH)2 (Iron(II) hydroxide): This is a compound formed by iron reacting with water and oxygen. It's a basic hydroxide compound and can easily undergo further oxidation to form other iron compounds.

3. Fe2(SO4)3 (Iron(III) sulfate): This compound contains iron in its +3 oxidation state and is combined with sulfate ions. It's a salt formed by the reaction of iron with sulfuric acid. It's often used in industrial processes and has various applications.

4. Fe(NO3)3 (Iron(III) nitrate): Similar to Fe2(SO4)3, this compound contains iron in its +3 oxidation state but is combined with nitrate ions. It's a soluble salt and can be used in various chemical reactions.

5. Fe3O3 (Iron(III) oxide, Hematite): This is a common iron oxide mineral. It's an important source of iron ore and is used in the production of iron. Hematite is stable and does not readily react with water or air.

If your sequence is meant to represent a trend in terms of reactivity or stability, it's generally true that compounds involving higher oxidation states of iron (such as +3) tend to be more reactive and less stable compared to lower oxidation states (such as +2). However, the specific reactivity and stability of these compounds can also be influenced by factors such as pH, temperature, and the presence of other substances.

Please note that the sequence you've provided is not a strict scientific law or rule, but rather a general trend that holds in many cases. If you have a specific context or question related to these compounds, feel free to provide more details, and I'll be happy to assist you further.