The kinetics of the reduction of tetraoxoiodate(VII) by <Emphasis Type="Italic">n</Emphasis>-(2-hydroxylethyl)ethylenediaminetriacetatocobaltate(II) ion in aqueous perchloric acid |
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| Authors: | A D Onu J F Iyun S O Idris |
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| Institution: | (1) Department of Chemistry, Ahmadu Bello University, Zaria, Nigeria;(2) Department of Chemistry, Federal College of Education, Zaria, Nigeria |
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| Abstract: | The stoichiometries, kinetics and mechanism of the reduction of tetraoxoiodate(VII) ion, IO4
− to the corresponding trioxoiodate(V) ion, IO3
− by n-(2-hydroxylethyl)ethylenediaminetriacetatocobaltate(II) ion, CoHEDTAOH2]− have been studied in aqueous media at 28 °C, I = 0.50 mol dm−3 (NaClO4) and H+] = 7.0 × 10−3 mol dm−3. The reaction is first order in Oxidant] and Reductant], and the rate is inversely dependent on H+ concentration in the range 5.00 × 10−3 ≤ H+≤ 20.00 × 10−3 mol dm−3 studied. A plot of acid rate constant versus H+]−1 was linear with intercept. The rate law for the reaction is:
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- \frac \textCoHEDTAOH2 - ]\textdt = ( a + b \textH + ] - 1 ) \textCoHEDTAOH2 - ] \textIO4 - ] - {\frac{{\left {{\text{CoHEDTAOH}}_{2}^{ - } } \right]}}{{{\text{d}}t}}} = \left( {a + b\left {{\text{H}}^{ + } } \right]^{ - 1} } \right)\left {{\text{CoHEDTAOH}}_{2}^{ - } } \right]\left {{\text{IO}}_{4}^{ - } } \right] |
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