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Briefly explicate why the concentrations of HC2H3O2 and C2H3O2- ion change when you add 0.10M HCl solution to the HC2H3O2-NaC2H3O2 buffer solution. State an appropriate chemical equation showing the changes that occur.

HC2H3O2 + H2O <------> H3O+ + C2H3O2-

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