Question

3) H2S → SO2 → SO3 → H2SO4 → BaSO4

Answer 1

1)2H2S+3O2(избыток)=2SO2+2H2O

2)2SO2+O2=2SO3

3)SO3+H2O=H2SO4

4)H2SO4+Ba(OH)2=BaSO4+2H2O

Вроде так

Answer 2

The given sequence represents a series of chemical reactions involving sulfur and hydrogen sulfide (H2S) leading to the formation of barium sulfate (BaSO4). Let's go through each step of the reaction:

1. Hydrogen sulfide (H2S) reacts with oxygen (O2) to form sulfur dioxide (SO2):

2 H2S + 3 O2 → 2 SO2 + 2 H2O

2. Sulfur dioxide (SO2) further reacts with oxygen (O2) to form sulfur trioxide (SO3):

2 SO2 + O2 → 2 SO3

3. Sulfur trioxide (SO3) then reacts with water (H2O) to produce sulfuric acid (H2SO4):

SO3 + H2O → H2SO4

4. Finally, sulfuric acid (H2SO4) reacts with barium chloride (BaCl2) to yield barium sulfate (BaSO4):

H2SO4 + BaCl2 → BaSO4 + 2 HCl

So, the overall reaction sequence is:

H2S + 3 O2 → 2 SO2 + 2 H2O 2 SO2 + O2 → 2 SO3 SO3 + H2O → H2SO4 H2SO4 + BaCl2 → BaSO4 + 2 HCl

Barium sulfate (BaSO4) is a white solid that is not soluble in water, which is why it is formed as a precipitate during the reaction.