The acid is a "weak" acid, being ionized only to a very slight extent in dilute aqueous solution.
They are ionized in aqueous solution to a much greater extent than ammonia, the quaternary ammonium bases being the most ionized, and the secondary bases being more strongly ionized than the primary or tertiary bases.
It is apparent that metallic salts of organic acids would, in aqueous solution, be ionized, the positive ion being the metal, and the negative ion the acid residue.
Esters, however, are not ionized.
Potassium benzene iso-diazotate resembles the normal salt, but is more stable, and is more highly ionized.