A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Oct/Nov 2011 · Q161 Mark

Sodium iodide reacts with concentrated sulfuric acid. The equation which represents one of the reactions that takes place is shown. 8NaI + 9H2SO4 → 8NaHSO4 + 4I2 + H2S + 4H2O Which species has been oxidised in this reaction?

AH⁺

BI⁻

CNa⁺

DSO4²⁻

✓ Correct answer

B: I⁻

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2011 Paper 1 Variant 2, question 16.

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