Question

Do H+ ions or H+(aq) ions impart acidic properties to acids? Do all acids have H+ or H+(aq)/Hydronium ions?

Does ph scale measure H+ or H+(aq) ion concentration?

Answer 1

Yes, all the acids impart the H⁺ ions in its solution i.e. hydronium ion and their acidic strength is also the measure of H⁺ ion imparted by them. And the pH scale measures the aqueous H⁺ ion concentration in solution of the acid.