Question

Осуществить следующие превращения: Pb -> PbO -> PbSO4 -> Pb(OH)2 -> PbO -> Pb -> PbCl2.

Answer 1

Pb -> PbO -> PbSO4 -> Pb(OH)2 -> PbO -> Pb -> PbCl2.
1. 2Pb+O2=2PbO
2.Pb+ Н2SO4=Н2O+PbSO4
3.PbSO4+2NaOН=Na2SO4+Pb(OH)2 выпадает в осадок
4. Pb(OH)2= PbО+Н2O
5.PbО+Н2=Pb+ Н2О
6. Pb+MgCl= PbCl2+Mg

Answer 2

Chemical Transformations

To carry out the following chemical transformations: Pb -> PbO -> PbSO4 -> Pb(OH)2 -> PbO -> Pb -> PbCl2, we can follow a series of chemical reactions.

1. Pb -> PbO: - The transformation of lead (Pb) to lead oxide (PbO) can be achieved through the reaction with oxygen. The balanced chemical equation for this reaction is: ``` 2Pb + O2 -> 2PbO ``` 2. PbO -> PbSO4: - The conversion of lead oxide (PbO) to lead sulfate (PbSO4) can be accomplished by reacting it with sulfuric acid (H2SO4). The balanced chemical equation for this reaction is: ``` PbO + H2SO4 -> PbSO4 + H2O ``` 3. PbSO4 -> Pb(OH)2: - The transition from lead sulfate (PbSO4) to lead hydroxide (Pb(OH)2) can be achieved by treating lead sulfate with a strong base, such as sodium hydroxide (NaOH). The balanced chemical equation for this reaction is: ``` PbSO4 + 2NaOH -> Pb(OH)2 + Na2SO4 ``` 4. Pb(OH)2 -> PbO: - The conversion of lead hydroxide (Pb(OH)2) back to lead oxide (PbO) can be accomplished by heating lead hydroxide. The balanced chemical equation for this reaction is: ``` Pb(OH)2 -> PbO + H2O ```

5. PbO -> Pb: - The reduction of lead oxide (PbO) to lead (Pb) can be achieved by heating lead oxide in the presence of carbon. The balanced chemical equation for this reaction is: ``` PbO + C -> Pb + CO ```

6. Pb -> PbCl2: - The transformation of lead (Pb) to lead chloride (PbCl2) can be achieved by reacting lead with hydrochloric acid (HCl). The balanced chemical equation for this reaction is: ``` Pb + 2HCl -> PbCl2 + H2 ```

By following these chemical reactions, the desired transformations from lead to lead chloride can be achieved.