Lactic acid is a common by-product of cellular respiration and is often said to cause the "burn" associated with strenuous activity. a 25.0-ml sample of 0.100 m lactic acid (hc3h5o3, pka 5 3.86) is titrated with 0.100 m naoh solution. calculate the ph after the addition of 0.0 ml, 4.0 ml, 8.0 ml, 12.5 ml, 20.0 ml, 24.0 ml, 24.5 ml, 24.9 ml, 25.0 ml, 25.1 ml, 26.0 ml, 28.0 ml, and 30.0 ml of the naoh. plot the results of your calculations as ph versus milliliters of naoh added.