One beaker contains 10.0mL of acetic acid/sodium acetate bufferat maximum buffer

One beaker contains 10.0mL of acetic acid/sodium acetate bufferat maximum buffer capacity and another contains 10.0mL of purewater. Calculate the hydronium ion concentration and the pH afterthe addition of 0.25mL of 0.10M HCL to each one. What accounts forthe difference in the hydronium ion concentrations? Explain thisbased on equilibrium concepts; in other words saying that onesolution is a buffer is not sufficient.