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Citation: Lin Juan-Juan, Wang Shun, Gao Qing-Yu. Complex Kinetics of the Periodate-Sulfite System[J]. Acta Physico-Chimica Sinica, ;2002, 18(09): 817-820. doi: 10.3866/PKU.WHXB20020910 shu

Complex Kinetics of the Periodate-Sulfite System

1.
Wenzhou Normal College， Wenzhou　325027;China University of Mining and Technology, College of Chemical Engineering, Xuzhou　221008

Received Date: 7 December 2001
Available Online: 15 September 2002

The complex kinetics of the reaction of periodate and sulfite has been investigated. This is a novel periodate-based oscillator. In excess of sulfite and in acidic medium（pH< 3）, batch single-peak phenomena and CSTR sustained oscillations of Pt 、I－ and pH potential, and the complex dynamics in a semibatch are obtained, while the alternative change of color from colorless to brown is also observed. The oscillation behavior is related to [KIO4]0/[Na2SO3]0 ratio and acidity. A possible reaction mechanism, which consists of an autocatalytic production of H＋(positive feedback) and a H＋-consuming pathway (negative feedback), along with the production and elimination of iodine, could fairly explain the complex dynamical behavior.
- Chemical oscillation;Complex kinetics;Periodate;Sulfite
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