BRAINCAKESodium Iodide
In the reaction of sodium iodide with sulfuric acid, the sulfuric acid acts as an acid and donates a proton to the halide.
Misty fumes of HI are observed. NaI + H2SO4 → NaHSO4 + HI
A redox reaction also occurs:
The iodide ions are strong enough reducing agents to reduce the concentrated sulphuric acid to sulfur dioxide, sulfur and hydrogen sulfide.
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Key terms in this lesson
- reducing agent
- A substance that donates electrons to another species, causing it to be reduced, while it is itself oxidised.
More in Group 7
- Halogen-Halide Displacement Reactions
- Halogen Disproportionation Reactions
- Reaction of Halides with Sulfuric Acid
- Sodium Chloride
- Sodium Bromide
- Test for Halide Ions
- Hydrogen Halides as Acids
- Reaction with Ammonia
All 14 lessons in Group 7 · All Edexcel AS-level Chemistry topics