school
Acemy

Oxidation-Reduction Reactions

AP Chemistry· difficulty 3/5

Permanganate oxidizes Fe2+ in acidic solution; the oxidation-state changes are listed.

MnO4- + Fe2+ -> Mn2+ + Fe3+ (acidic) Mn: +7 -> +2 (gain 5 e-) Fe: +2 -> +3 (lose 1 e-) balance e-?

The balanced ratio of MnO4- to Fe2+ is:

  • A

    2 : 5

  • B

    1 : 1

  • C

    5 : 1

  • D

    1 : 5

    check_circle

Explanation

To balance electrons (5 gained vs 1 lost), multiply Fe half-reaction by 5: 1 MnO4- consumes 5 Fe2+.

Want 10 more like this — adaptive to your weak spots?

Practice 10 like thisarrow_forwardPredict my AP score

Related questions

auto_awesomeAll Toolsquestion_answerHomework Q&Amenu_bookAP & SAT PreptimelineLearn Mode