Interaction | Reaction | Process     Data Page

Potassium iodide reacts with aqueous chlorine to give iodine and potassium chloride.

The iodine can be titrated with thiosulfate, and therefore the chlorine concentration can be determined.

Note, if excess KI is used, the liberated I2 complexes with iodide ion to give the very soluble [I3]– ion.

2
KI
  +  
Cl2
  +  
H2O
         
I2
  +  
2
KCl
Reactant Page Go To Go To
Potassium iodide     Reactions Using    Reactions Forming
Chlorine     Reactions Using    Reactions Forming
Water Solvent    Reactions Using    Reactions Forming
Iodine     Reactions Using    Reactions Forming
Potassium chloride     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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