hidrogénion
Hidrogénion is the positively charged hydrogen species that results when a hydrogen atom loses its electron. In many environments a truly free hydrogen ion cannot exist; in aqueous solutions it is highly solvated and is usually described as a hydronium ion, H3O+. The term H+ is often used in chemical equations to represent this solvated proton.
In water, the bare proton is rapidly surrounded by water molecules to form H3O+, and more detailed
In acid–base chemistry, the hidrogénion is central to defining acidity. Water undergoes autoprotolysis: 2 H2O ⇌ H3O+
Aside from aqueous solutions, a bare proton exists in the gas phase and in some solids, but