Chemistry · Oct / Nov 2024 · Paper 12 · Question 20
5070Redox
Peroxodisulfate ions, S2O8^2–, react with iron(II) ions, Fe^2+. S2O8^2– + 2Fe^2+ → 2SO4^2– + 2Fe^3+ The only elements that are either oxidised or reduced in this reaction are sulfur and iron. Which row is correct?
- Airon / oxidising agent
- Biron / reducing agent
- Csulfur / oxidising agent
- Dsulfur / reducing agent
As printed in the paper
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Correct answer: C. sulfur / oxidising agent
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