typically H+ in aq. is H3O+ [hydronium] https://en.wikipedia.org/wiki/Hydronium https://en.wikipedia.org/wiki/Hydronium oxygen has greater electronegativity t

typically H+ in aq. is H3O+ [hydronium] https://en.wikipedia.org/wiki/Hydronium https://en.wikipedia.org/wiki/Hydronium oxygen has greater electronegativity than hydrogen thus oxygen takes a greater share of the electronic orbital, becoming a net positive region