Question

S->SO2->SO3->H2SO4->CaSO4​

Answer 1

$S - SO_{2} - SO_{3} - H_{2}SO_{4} - CaSO_{4} \\ \\1) \: S + 2O_{2} = SO_{2} \\2) \: 2SO_{2} + O_{2} = 2SO_{3} \\3) \: SO_{3} + H_{2}O = H_{2}SO_{4} \\4) \: H_{2}SO_{4} + CaO= CaSO_{4}$

Answer 2

The sequence you've provided represents a simplified chemical reaction pathway involving sulfur and oxygen compounds. Let's break it down step by step:

1. S -> SO2: This step involves the oxidation of sulfur (S) to form sulfur dioxide (SO2). The reaction typically involves burning or oxidizing elemental sulfur to produce SO2: S + O2 -> SO2

2. SO2 -> SO3: This step represents the further oxidation of sulfur dioxide (SO2) to form sulfur trioxide (SO3). This reaction usually requires a catalyst such as V2O5 and elevated temperatures: 2SO2 + O2 (in the presence of a catalyst) -> 2SO3

3. SO3 -> H2SO4: The next step involves the conversion of sulfur trioxide (SO3) to sulfuric acid (H2SO4). This is typically done by dissolving SO3 in water: SO3 + H2O -> H2SO4

4. H2SO4 -> CaSO4: Finally, the last step appears to involve the reaction of sulfuric acid (H2SO4) with calcium ions to form calcium sulfate (CaSO4). This is a precipitation reaction: H2SO4 + Ca2+ -> CaSO4 (precipitate)

The overall reaction sequence can be summarized as follows: S + O2 -> SO2 2SO2 + O2 (catalyst) -> 2SO3 SO3 + H2O -> H2SO4 H2SO4 + Ca2+ -> CaSO4 (precipitate)

Please note that in actual chemical processes, there may be additional intermediate steps and conditions involved in each of these reactions. The details may vary depending on the specific reaction conditions and the intended application.