In a titration experiment, H O (aq) reacts with aqueous MnO -(aq) as represented by the equation 224
above. The dark purple KMnO4 solution is added from a buret to a colorless, acidified solution of H2O2(aq) in an Erlenmeyer flask. (Note: At the end point of the titration, the solution is a pale pink color.)
Which of the following best describes what happens to the pH of the H2O2 solution as the titration proceeds?