BRAINCAKEExam-style Question 1
Question (3 marks): In acidic solution, manganate(VII) ions oxidise iron(II) ions to iron(III) ions. The half-equations are:
MnO4− (aq) + 8 H+ (aq) + 5 e− → Mn2+ (aq) + 4 H2O (l)
Fe2+ (aq) → Fe3+ (aq) + e−
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Key terms in this lesson
- half-equation
- An equation showing only the electrons lost or gained by one species in a redox reaction.
- oxidation number
- A number assigned to an atom showing its degree of oxidation, based on the electrons it would gain or lose if all bonds were ionic.
More in Oxidation and Reduction
- Systematic Names
- Example Question 1
- Example Question 2
- Ionic Equations
- Exam-style Question 2
- Exam-style Question 3
- Exam-style Question 4
- Exam-style Question 5
All 14 lessons in Oxidation and Reduction · All Edexcel AS-level Chemistry topics