Questions 32-34 refer to the following. 5 H2O2(aq) + 2 MnO4 −(aq) + 6 H+(aq) → 2 Mn2+(aq) + 8 H2O(l) — Acids and Bases Chemistry Question
Question
Questions 32-34 refer to the following.
5 H2O2(aq) + 2 MnO4 −(aq) + 6 H+(aq) → 2 Mn2+(aq) + 8 H2O(l) + 5 O2(g)
In a titration experiment, H2O2(aq) reacts with aqueous MnO4 −(aq) as represented by the equation 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?
The +2 charge on the manganese ions maintains the acidity of the solution.
The production of water dilutes the solution, making it basic.
As H+ ions are consumed, the solution becomes less acidic and the pH increases.
As H+ ions are consumed, the solution becomes less acidic and the pH decreases.