Final answer:
An Arrhenius acid forms H3O+ in water, an Arrhenius base forms OH-, and when an Arrhenius acid reacts with an Arrhenius base, water is always formed.
Explanation:
An Arrhenius acid forms H3O+ in water, while an Arrhenius base forms OH- in water. When an Arrhenius acid reacts with an Arrhenius base, water (H2O) is always formed.
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