AP® Chemistry

Free Version

Upgrade subject to access all content

Difficult

Hydrogen Peroxide

APCHEM-EYLEWI

An old bottle of store-brand hydrogen peroxide needs to be analyzed using a redox titration to determine the amount of hydrogen peroxide remaining.

Which of the following is the BEST reagent with a correct justification for this task?

A

Potassium permanganate.

The oxidized and reduced forms are different colors at the equivalence point.

B

Potassium permanganate.

The oxidized and reduced forms are different colors at different pH values.

C

Potassium dichromate.

It will form a colored precipitate at the equivalence point.

D

Potassium dichromate.

It will make the hydrogen peroxide change colors at the equivalence point.