Based on the titration, the species that are decreasing in concentration before the equivalence point is reached are [tex]HA \;and \;H^+ (H3O^+)[/tex]
An equivalence point can be defined as the point in a titration wherein the amount of reagent (titrant) added sufficiently neutralizes the analyte (titrand) solution.
This ultimately implies that, an equivalence point is the amount of strong acid that is needed or required to completely neutralize a weak base.
In this scenario, the species of chemical element and compound that are decreasing in concentration before the equivalence point is reached include the following: [tex]HA \;and \;H^+ (H3O^+)[/tex]
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