According to Arrhenius, acid generates _____ ions in water.
H+
According to Arrhenius, an acid is a substance that dissociates in water to form hydrogen ions (H+) and base is a substance that dissociates in water to form hydroxide (OH–) ions.
For example: Hydrochloric acid (HCl) is an acid as it gives H+ in an aqueous solution and sodium hydroxide (NaOH) is a base as it dissociates in water to give OH− ions.