Hydronium ion, hydrated proton, H3o+ 水合氢离子 Electrostatic potential map of the hydronium ion. The proton is always associated with water molecules in aqueous solution The H3o+ ion is the simplest formula of a hydrated protonHydronium Hydronium ion, hydrated proton, H , hydrated proton, H3O+ Electrostatic potential map of the Electrostatic potential map of the hydronium ion. The proton is ion. The proton is always associated with water mo always associated with water molecules in aqueous solution. lecules in aqueous solution. The H3O+ ion is the simplest formul ion is the simplest formula of a hydrated proton. a of a hydrated proton. 水 合 氢 离 子