Final answer:
Hydrogen bonds form when water is removed from an acid to hold the acids together. The hydrogen bond weakens the H-A covalent bond and forms the hydronium ion.
Step-by-step explanation:
When water is removed from an acid, hydrogen bonds form to hold the acids together. Hydrogen bonds are weak, partially covalent bonds that form between the hydrogen atom of one molecule and the electronegative atom of another molecule. In the case of acids, the hydrogen bond weakens the H-A covalent bond, causing it to stretch and then break. The hydrogen atom that was bonded to the water molecule then becomes fully bonded to the oxygen, forming the species H30 (the hydronium ion) and the acid now exists as an anion.