Write the reaction equation: S → ZnS → SO2 → SO3 → H2SO4 → BaSO4 Si → Mg2Si → SiO2 → Na2SiO3

Write the reaction equation: S → ZnS → SO2 → SO3 → H2SO4 → BaSO4 Si → Mg2Si → SiO2 → Na2SiO3 → H2SiO3 → SiO2

Let’s carry out transformations in the first chain:

1. S + Zn = ZnS;

2. 2ZnS + 3O2 = 2ZnO + 2SO2;

3.S + 4O2 + O20 = S + 6O3-2, let’s arrange the coefficients for this reaction by the electronic balance method:

S + 4 – 2 e- → S + 6, reducing agent, process – oxidation;

O20 + 4 e- → 2O-2, oxidizing agent, process – reduction;

2SO2 + 3O2 = 2SO3;

4. SO3 + H2O = H2SO4;

5.H2SO4 + Ba (OH) 2 = BaSO4 + 2H2O.

Let’s compose the reaction equations for the second chain:

1. Si + 2Mg = Mg2Si;

2. Mg2Si + 2O2 = 2MgO + SiO2;

3. SiO2 + Na2O = Na2SiO3;

4. Na2SiO3 + H2SO4 = H2SiO3 ↓ + Na2SO4;

5.H2SiO3 → SiO2 + H2O.