Kinetics and mechanism of the reduction of enneamolybdonickelate(IV) by iodide |
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| Authors: | Guoyan Huo Xuguang Zhao Baosheng Liu |
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| Affiliation: | (1) School of Chemistry and Environmental Science, Hebei University, 071002 Baoding, P.R. China |
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| Abstract: | The kinetics and mechanism of the reduction of enneamolybdonickelate(IV) by iodide in acid aqueous solution was studied by spectrophotometry. The reaction rate increases, as the concentration of H+ increases and with temperature. It shows that the reaction rate law is ![$$-{{rm d}_{C_{{rm Ni^{IV} M}}} over {d_{t}}} =
{{K_1K_2k[{rm
H}^+]_{e} [{rm I}^-]_{T} [{rm Ni}^{IV} {rm M}]_{T}} over {1+K_1
[{rm H}^{+}]_{e} + K_{1}K_{2}[{rm I}^-]_{T}[{rm H}^+]_{e}}}
= k_{{rm obs}} [{rm Ni}^{IV} M]_{rm T} .$$](/content/t70134u4637v0553/11243_2004_Article_3517_TeX2GIFIEq1.gif) The reaction rate constants and activation parameters of the rate-determining steps were evaluated. A mechanism related to the reaction is proposed. |
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