Kinetics and Mechanisms of Reactions Involving a Halogen Species

9 KINETICS AND MECHANISMS OF REACTIONS INVOLVING A HALOGEN SPECIES 

The oxo-salts of the halogens are strong oxidants whereas the halides, especially die iodide, may act as reductants. Some of the reactions involving halogen species are sufficiently slow to make kinetic studies possible without the need for special fast reaction techniques. 

In acid solution, iodide solutions are slowly oxidised by iron(lll) salt solutions. 

Use boiled-out distilled water to prepare a stock of 0.2 M sulphuric acid. Use the acid to prepare a 0.04 M KI solution and separately a 0.04 M iron(III) solution (from purest ammonium iron(IIl) sulphate dodecahydrate). Place one solution in flask A (Fig.2.12) 

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