Five solutions were prepared by dissolving 0.00100 mole of each of the following compounds in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution? Why?
All of these oxides are the acid anhydrides of various acids. Sulfur trioxide is the acid anhydride of sulfuric acid, the strongest such acid.
Take an oxo acid, sulfuric acid, nitric acid, phosphoric acid, take away the elements of water, and you form the so-called
Add the elements of water, you get back the acid. Clearly, sulfur trioxide is the acid anhydride of sulfuric acid,