Interaction | Reaction | Process     Data Page

In the lab, the addition of conc. sulfuric acid to sodium iodide gives a complex mixture of: HI, SO2, S, H2S and I2, as well as sodium sulfate and water.

Observations: solid yellow sulfur, smell of bad eggs (H2S), purple fumes and/or formation of solid, black iodine, I2.

The reaction , as shown above, has NOT been balanced, although each of the individual steps have been balanced elsewhere in the database.
NaI
  +  
H2SO4
         
HI
  +  
I2
  +  
SO2
  +  
S
  +  
H2S
Reactant Page Go To Go To
Sodium iodide     Reactions Using    Reactions Forming
Sulfuric acid     Reactions Using    Reactions Forming
Hydrogen iodide     Reactions Using    Reactions Forming
Iodine     Reactions Using    Reactions Forming
Sulfur dioxide     Reactions Using    Reactions Forming
Sulfur     Reactions Using    Reactions Forming
Hydrogen sulfide     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
British A-Level Chemistry: A2
British A-Level Chemistry: AS
Oxidation: Of Substrate By Reagent
Proton transfer: Brønsted reaction
Redox
Sodium Halides + conc. H2SO4

© Mark R. Leach 1999 –

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