väävelpentoksiidi
Väävelpentoksiidi, chemical formula S2O5, is an inorganic compound. It is the anhydride of sulfurous acid, meaning it is formed by the removal of water from sulfurous acid. Väävelpentoksiidi exists as a white crystalline solid. It is typically formed when sulfur dioxide (SO2) is reacted with oxygen (O2) under specific conditions, though it is an intermediate in some reactions rather than a commonly isolated product.
This compound is relatively unstable and readily reacts with water to reform sulfurous acid. Its reactivity