An Arrhenius acid increases H3O+ ions in water, and a base increases OH- ions. Acids release H+ ions combining with water to form H3O+.
Arrhenius Definition of Acids and Bases: An Arrhenius acid is a compound that increases the concentration of H3O+ ions in water, while an Arrhenius base increases the concentration of OH- ions. When acids are dissolved in water, they release H+ ions which then combine with water to form H3O+, known as the hydronium ion.
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