How wold you identify an arrhenius acid in a chemical equation

An Arrhenius acid is any species that increases the concentration of H+start text, H, end text, start superscript, plus, end superscript in aqueous solution. An Arrhenius base is any species that increases the concentration of OH-start text, O, H, end text, start superscript, minus, end superscript in aqueous solution.

An Arrhenius acid is a compound that increases the H + ion concentration in aqueous solution. The H + ion is just a bare proton, and it is rather clear that bare protons are not floating around in an aqueous solution.