Question

С1 Осуществить превращения. Назвать вещества. Указать тип реакций. Fe2O3→ Fe2 (SO4)3→ Fe(OH)3 → Fe2O3

Answer 1

Fe2O3 + 3H2SO4 = Fe2(SO4)3 + 3H2O - реакция обмена
Fe2(SO4)3 + 6NaOH = 2Fe(OH)3 + 3Na2SO4 - реакция обмена
2Fe(OH)3 = Fe2O3 + 3H2O - реакция разложения (при нагревании)
Fe2O3 - оксид железа (lll)
H2SO4 - серная кислота
Fe2(SO4)3 - сульфат железа (lll)
H2O - вода
NaOH - гидроксид натрия
Fe(OH)3 - гидроксид железа (lll)
Na2SO4 - сульфат натрия

Answer 2

Chemical Transformations and Reactions

The given chemical equation is:

Fe2O3 → Fe2(SO4)3 → Fe(OH)3 → Fe2O3

Let's break down the equation and identify the substances involved and the types of reactions.

1. Fe2O3 → Fe2(SO4)3: - The first transformation involves the conversion of iron(III) oxide (Fe2O3) to iron(III) sulfate (Fe2(SO4)3). - This is an example of a redox reaction, specifically an oxidation-reduction reaction, where iron undergoes oxidation and sulfur undergoes reduction. - The reaction can be represented as follows: ``` 2 Fe2O3 + 3 O2 → 2 Fe2(SO4)3 ```

2. Fe2(SO4)3 → Fe(OH)3: - The second transformation involves the conversion of iron(III) sulfate (Fe2(SO4)3) to iron(III) hydroxide (Fe(OH)3). - This is an example of a precipitation reaction, where a solid precipitate is formed. - The reaction can be represented as follows: ``` Fe2(SO4)3 + 6 NaOH → 2 Fe(OH)3 + 3 Na2SO4 ```

3. Fe(OH)3 → Fe2O3: - The third transformation involves the conversion of iron(III) hydroxide (Fe(OH)3) back to iron(III) oxide (Fe2O3). - This is an example of a dehydration reaction, where water is removed from the compound. - The reaction can be represented as follows: ``` 2 Fe(OH)3 → Fe2O3 + 3 H2O ```

Please note that the reactions mentioned above are simplified representations of the transformations and may involve additional steps or conditions in reality.