What is an oxyacid?
It is an acidic substance in which one or more hydrogen atoms are bonded to oxygen atoms that are on turn bonded to another element "
An acid is a substance which is able to donate protons (
In the case of an oxyacid,
The element X is an electronegative nonmetal, as
Then, helped by the high electronegativity of the oxygen atom, the couple
The proton (
This process is called ionisation and leaves an oxoanion,
So, the complete acid-base or proton transfer process is:
Example with nitric acid (
Example with nitric acid and ammonia as base:
In some cases the central element is not highly electronegative, but it gains withdrawing effect by its bonds with extra oxygen atoms, as in carbonic acid (
In general, the higher is the number of extra oxygen atoms, the stronger is the oxyacid (i.e. it is more easily ionizable).
This can be demonstrated from many evidences, as:
a) nitric acid
b) sulfuric acid
c) the chlorine oxyacids are stronger in the sequence:
or, by name:
hypochlorous < chlorous < chloric < perchloric acid