Question

How can you determine anhydrides of acids and bases?

Answer 1

Well, the `"acid anhydride"` is simply two equiv of the parent acid LESS a water molecule...........

Explanation:

And so acetic anhydride is the anhydride of 2 equiv of acetic acid:

`"2H"_3"CC(=O)(OH)"rarr"H"_3"CC(=O)(O)C(=O)(CH"_3) + "H"_2"O"`

And the `"base anhydride"` is an older term that is used in inorganic chemistry; i.e. it refers to 2 equiv of the hydroxide LESS water:

`2NaOH rarr Na_2O + H_2O`

`"Natrium oxide"` is the base anhydride of `"sodium hydroxide"`.