Are all acid have covalent structure in solid state?

[henry407]

Are all acid have covalent structure in solid state?

 

[Borek]

You are aware of the fact that there are no things like "purely covalent" and "purely ionic"?

 

[Bloodthunder]

I think there are purely covalent bonds (like between identical atoms. Between oxygen atoms in O2?).

Anyway, when not dissolved in water, I think acids would have covalent bonds between atoms in the compound and intermolecular forces (dipole-dipole interaction, hydrogen bonding, etc.) between molecules.