Abstract

The reduction of selenium (IV) by iron (II) in presence of sodium fluoride has been kinetically studied in presence of slightly acidic medium. The reaction rate is first order with respect to iron (II) but is independent of Se(IV). It is also directly proportional to fluoride concentration, but acid has a retarding effect. The reaction rate increases with increasing ionic strength, but decreases with increasing di-electric constant of the medium. A suitable mechanism has been proposed leading to a rate expression.

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