Kinetics of the iodate–iodide reaction: catalysis by carboxylate and phosphate ions

Barton, Allan F. M.; Wright, Graham A.

doi:10.1039/j19680002096

Cited by 37 publications

(45 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 to 8 were obtained. Here the rate law for iodate reduction involves a fifth-order expression [30] which appears to be confirmed by preliminary experiments in our laboratory. At pH 10 the predominant species, after about five minutes, were and IO3" at the same concentrations predicted by the equilibrium model.…”

Section: B Kinetic Modelssupporting

confidence: 60%

The Equilibria and Kinetics of Iodine Hydrolysis

Palmer

Lietzke

1982

Radiochimica Acta

View full text Add to dashboard Cite

lodine hydrolysis/Equilibriutn/Kinetics/Aqueous Solution SummaiyA complete set of equilibrium expressions involving all the relevant iodine speciesbelieved to result from hydrolysis and disproportionation was solved simultaneously as a function of initial iodine concentration, pH and temperature using the Newton-Raphson method. Conclusions could be drawn as to the relative iraportance of the major species and this model was validated by a limited number of experiments conducted at 25°C and II, ]" = 10"' gatom 1"'. The kinetics of I, disproportionation into the +1 and -1 oxidation states were combined with various rate expressions for the formation and disappearance of iodate and the entire system involving four differential equations was solved numerically as a function of initial iodine concentration and pH.

show abstract

Section: B Kinetic Modelssupporting

confidence: 60%

The Equilibria and Kinetics of Iodine Hydrolysis

Palmer

Lietzke

1982

Radiochimica Acta

View full text Add to dashboard Cite

show abstract

“…Desired concentrations and rates are printed out on demand. For reaction (6) only stoichiometry need be considered as [IO-] is so small as to make 10negligible as a reactant.…”

Section: The Enigma Of the Iodide Exponentmentioning

confidence: 99%

The detailed mechanism of the Dushman reaction explored by computer

Liebhafsky

Roe

1979

Int J of Chemical Kinetics

View full text Add to dashboard Cite

Since 1926 investigations of the Dushman reaction have relied mainly upon "constant-rate" measurements, usually by instrumental methods. Since about that time, the confusion surrounding this venerable reaction has been growing. In part, the confusion arises because the reaction involves reactive intermediate species that have not been studied directly-and may never be. Alternative detailed mechanisms have been assumed with little restraint. One of these, which is built around HzIz03, has been explored by computer with promising results.The mechanism seems capable of reducing the confusion now attending the Dushman reaction and others related to it.

show abstract

“…Buffer solutions were made up from sodium hydrogen sulfate and sodium sulfate of known concentrations. Acetate and phosphate buffers were avoided, since these are known to catalyze the iodide-iodate reaction (6). Analytical grade N a N 0 3 was used to keep the ionic strength constant in the different buffer solutions.…”

Section: Methodsmentioning

confidence: 99%

Kinetics of Oxidation of Ferrocyanide by lodate Ion

Sulfab¹,

Elfaki²

1974

Can. J. Chem.

View full text Add to dashboard Cite

In the presence of vast excess of ferrocyanide, over the pH range 1.76–2.65, the reaction between iodate and ferrocyanide ions follows the rate law[Formula: see text]where ka and kb have values of 1.97 × 103 M−2 min−1 and 4.08 × 105 M−3 min−1, respectively, at an ionic strength of 1.18 M and a temperature of 25.0 ± 0.1 °C. K1 is the formation constant of monoprotonated ferrocyanide. The "overall activation energy" of the reaction was found to be 15.8 kcal/mol. Rate-determining steps consistent with the kinetics have been proposed.

show abstract

Kinetics of the iodate–iodide reaction: catalysis by carboxylate and phosphate ions

Abstract: The iodate-iodide reaction was investigated by a direct amperometric method of iodine determination. and catalysis by carboxylate and phosphate ions (B-) was found to occur. The reaction rate may be expressed by At 25" Of kb (

Cited by 37 publications

References 0 publications

The Equilibria and Kinetics of Iodine Hydrolysis

The Equilibria and Kinetics of Iodine Hydrolysis

The detailed mechanism of the Dushman reaction explored by computer

Kinetics of Oxidation of Ferrocyanide by lodate Ion

Contact Info

Product

Resources

About