A \(25.0-\mathrm{mL}\) sample of \(0.100 \mathrm{M}\) lactic acid \(\left(\mathrm{HC}_{3} \mathrm{H}_{5} \mathrm{O}_{3}, \mathrm{pK}ight.\) =3.86) is titrated with \(0.100 \mathrm{M} \mathrm{NaOH}\) solution. Calculate the \(\mathrm{pH}\) after the addition of \(0.0 \mathrm{~mL}, 4.0 \mathrm{~mL}, 8.0 \mathrm{~mL}\), \(12.5 \mathrm{~mL}, 20.0 \mathrm{~mL}, 24.0 \mathrm{~mL}, 24.5 \mathrm{~mL}, 24.9 \mathrm{~mL}, 25.0 \mathrm{~mL}\), \(25.1 \mathrm{~mL}, 26.0 \mathrm{~mL}, 28.0 \mathrm{~mL}\), and \(30.0 \mathrm{~mL}\) of \(\mathrm{NaOH}\). Plot the results of your calculations as \(\mathrm{pH}\) versus milliliters of \(\mathrm{NaOH}\) added.