Interaction | Reaction | Process     Data Page

Chlorine will oxidise iodide ion to iodine.

This is a useful analytical test. A suspect iodide salt is added to chlorine water plus a small volume of carbon tetrachloride. The liberated iodine concentrates in the organic layer giving a purple colouration.

In water, iodine forms a brown solution and/or gives a black ppt.

2
I–
  +  
Cl2
        
I2
  +  
2
Cl–
Reactant Page Go To Go To
Iodide ion     Reactions Using    Reactions Forming
Chlorine     Reactions Using    Reactions Forming
Iodine     Reactions Using    Reactions Forming
Chloride ion     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
British A-Level Chemistry: AS
Oxidation: Of Substrate By Reagent
Redox

© Mark R. Leach 1999 –

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