Question

S ⇒ H2S⇒ SO2⇒SO3⇒Na2SO4 ⇒ BaSO4

Answer 1

S+H2=H2S
2H2S+3O2=2SO2+2H2O
2SO2+O2=2SO3
SO3+2NAOH=NA2SO4+H2O
Na2So4+Ba(No3)2=BaSo4+2NaNo3

Answer 2

The sequence you provided represents a series of chemical reactions. Here's a breakdown of each step:

1. S (sulfur) reacts with H2 (hydrogen gas) to form H2S (hydrogen sulfide): S + H2 → H2S

2. H2S (hydrogen sulfide) reacts with O2 (oxygen gas) to produce SO2 (sulfur dioxide) and H2O (water): 2 H2S + 3 O2 → 2 SO2 + 2 H2O

3. SO2 (sulfur dioxide) undergoes further oxidation in the presence of oxygen to form SO3 (sulfur trioxide): 2 SO2 + O2 → 2 SO3

4. SO3 (sulfur trioxide) reacts with water to produce H2SO4 (sulfuric acid): SO3 + H2O → H2SO4

5. H2SO4 (sulfuric acid) reacts with Na2O (sodium oxide) to form Na2SO4 (sodium sulfate): H2SO4 + Na2O → Na2SO4 + H2O

6. Na2SO4 (sodium sulfate) reacts with BaCl2 (barium chloride) to yield BaSO4 (barium sulfate) and 2 NaCl (sodium chloride): Na2SO4 + BaCl2 → BaSO4 + 2 NaCl

Each reaction in this sequence represents a transformation of the reactants into the products mentioned.