Question

ZnS⇒SO2 ⇒SO3 ⇒H2SO4⇒Na2SO4-NaOH

Answer 1

2ZnS + 3O2 =2ZnO + 2SO2
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
2NaOH + H2SO4 = Na2SO4 +2H2O
Na2SO4 + Ba(OH)2 = BaSO4 +2NaOH

Answer 2

The reaction sequence you provided involves the conversion of zinc sulfide (ZnS) to sodium sulfate (Na2SO4) through a series of chemical reactions. Let's break down each step:

1. ZnS → SO2: Zinc sulfide (ZnS) is heated, leading to the decomposition of ZnS into zinc oxide (ZnO) and sulfur dioxide (SO2) gas.

2. SO2 → SO3: The produced sulfur dioxide (SO2) gas is further oxidized to sulfur trioxide (SO3) by exposure to oxygen in the presence of a catalyst.

3. SO3 → H2SO4: Sulfur trioxide (SO3) is then reacted with water (H2O) to form sulfuric acid (H2SO4).

4. H2SO4 → Na2SO4 + NaOH: Sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to form sodium sulfate (Na2SO4) and water (H2O).

Overall reaction: ZnS + 3O2 + 2H2O + 2NaOH → Na2SO4 + ZnO + 2H2O

It's worth noting that water is both consumed and produced during the reaction sequence, so it is not explicitly shown in the balanced equation for the overall reaction.