Question

составьте уравнения реакций, с помощью которых можно осуществить превращения: ZnS------>SO2----->SO3---->H2SO4----->SO2. переход 4 в схеме превращения рассмотрите с точки зрения ОВР

Answer 1

ZnS + O2 = Zn + SO2

 

2SO2 + O2 = 2SO3

 

SO3 + H2O = H2SO4

 

H2SO4 + Na2SO3 = Na2SO4 + H2SO3

H2SO3 = H2O + SO2

H2O - восстановитель

SO2 - окислитель

Answer 2

Chemical Reactions for the Transformation of ZnS to SO2 to SO3 to H2SO4 to SO2

To transform ZnS into SO2, then into SO3, followed by H2SO4, and finally back to SO2, we can use a series of chemical reactions. Let's break down the reactions step by step.

1. ZnS to SO2: - The transformation of ZnS to SO2 can be achieved through the roasting process, where ZnS is heated in the presence of oxygen to produce SO2 and ZnO. - The balanced chemical equation for this reaction is: ``` ZnS + 3O2 → ZnO + 2SO2 ```

2. SO2 to SO3: - The conversion of SO2 to SO3 is typically carried out using the contact process, which involves catalytic oxidation of SO2 with oxygen. - The balanced chemical equation for this reaction is: ``` 2SO2 + O2 → 2SO3 ```

3. SO3 to H2SO4: - The production of H2SO4 (sulfuric acid) from SO3 involves the addition of water to SO3, a process known as the hydration of SO3. - The balanced chemical equation for this reaction is: ``` SO3 + H2O → H2SO4 ```

4. H2SO4 to SO2: - The decomposition of H2SO4 to SO2 and other products can be achieved through heating the sulfuric acid. - The balanced chemical equation for this reaction is: ``` 2H2SO4 → 2H2O + 2SO2 + O2 ```

Oxidation State Changes in the Transformation Process

From the perspective of oxidation-reduction (redox) reactions, let's consider the oxidation state changes in the transformation process.

- In the transformation of ZnS to SO2, the oxidation state of sulfur changes from -2 in ZnS to +4 in SO2. - In the conversion of SO2 to SO3, the oxidation state of sulfur changes from +4 to +6. - When SO3 is hydrated to form H2SO4, the oxidation state of sulfur remains at +6. - Finally, in the decomposition of H2SO4 to SO2, the oxidation state of sulfur changes from +6 to +4.

These oxidation state changes reflect the transfer of electrons and the redox nature of the chemical transformations involved in the process.

I hope this explanation helps! If you have further questions or need additional information, feel free to ask.