To obtain sulfuric acid from sulfur (VI) oxide, it is enough to pass sulfuric anhydride through water. This produces sulfuric acid. Water and sulfur trioxide react with each other in any ratio.
SO3 + H2O = H2SO4
When dilute sulfuric acid reacts with zinc, zinc sulfate and hydrogen gas are formed. This reaction takes place under standard conditions.
Zn + H2SO4 = H2 + ZnSO4
When hydrogen is passed over molten sulfur, a poisonous gas with a specific smell of rotten eggs is formed – hydrogen sulfide.
H2 + S = H2S
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