BRAINCAKEExam Style Question - 3
Question: Combine the half-equations below to give the overall equation for the reaction of acidified manganate(VII) ions with iron(II) ions.
MnO4- + 8H+ + 5e- → Mn2+ + 4H2O
Fe2+ → Fe3+ + e-
Step 1: the number of electrons lost must equal the number gained. The manganate(VII) half-equation gains 5 electrons, so the iron half-equation is multiplied by 5: 5Fe2+ → 5Fe3+ + 5e-
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More in Oxidation and Reduction
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- Thermite Reaction
- Half Equations from Ionic Equations
- Exam Style Question - 1
- Exam Style Question - 2
- Exam Style Question - 5
All 15 lessons in Oxidation and Reduction · All AQA AS-level Chemistry topics