By definition, a strong acid must completely ionize in aqueous solution. However, in order to completely dissociate in water, strong acids must be more acidic than a hydronium ion and hence have a pKa < -1.74.
I have always thought of nitric acid as a strong acid, however, nitric acid has a pKa value of -1.5, which technically should indicate that it is less acidic than the hydronium ion and hence cannot completely dissociate in water like a strong acid does, right?
Could someone please explain whether nitric acid dissociates completely in water or not? There seems to be a lot of vagueness surrounding these definitions and classifications and it seems to me like they contradict each other.