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Arrhenius Acids and Bases. The Arrhenius definition of acids and bases is one of the oldest. An Arrhenius acid is a substance that when added to water increases the concentration of H1+ ions present.The chemical formulas of Arrhenius acids are written with the acidic hydrogens first.An Arrhenius base is a substance that when added to water increases the concentration of OH1- ions present.HCl is an example of an Arrhenius acid and NaOH is an example of an Arrhenius base.he chemical formulas of Arrhenius acids are written with the acidic hydrogens first. An Arrhenius base is a substance that when added to water increases the concentration of OH1- ions present.
According to Arrhenius theory, an acid is a substance which has a hydrogen atom and can be given in the form of hydrogen ion in aqueous solution.Such substances are called as Arrhenius acids.or example, Ammonia is not a base according to the Arrhenius acid-base theory. Since there is no hydroxyl group present in the ammonia (NH 3) molecule, so, it should be basic. But ammonia shows basic nature. This can be explained by using the concept of aqueous solution.