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Questions 32-34 refer to the following. 5 H2O2(aq) + 2 MnO4 −(aq) + 6 H+(aq) → 2 Mn2+(aq) + 8 H2O(l)Kinetics 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.)

At a certain time during the titration, the rate of appearance of O2(g) was 1.0 × 10^−3 mol/(L·s). What was the rate of disappearance of MnO4 − at the same time?

A.

6.0 × 10^−3 mol/(L·s)

B.

4.0 × 10^−3 mol/(L·s)

C.

6.0 × 10^−4 mol/(L·s)

D.

4.0 × 10^−4 mol/(L·s)

✓ Correct
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