The oxidation of HSO3 by O2 in aqueous solution is a reaction of importance to the

Chapter 22, Problem 22.40

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The oxidation of HSO3 by O2 in aqueous solution is a reaction of importance to the processes of acid rain formation and flue gas desulfurization. R.E. Connick, Y.-X. Zhang, S. Lee, R. Adamic, and P. Chieng (Inorg. Chem. 34, 4543 (1995)) report that the reaction 2 HSO3 + O2 2 SO4 2 + 2 H+ follows the rate law v = k[HSO3 ]2[H+]2. Given a pH of 5.6 and an oxygen molar concentration of 2.4 104 mol dm3 (both presumed constant), an initial HSO3 molar concentration of 5 105 mol dm3, and a rate constant of 3.6 106 dm9 mol3 s1, what is the initial rate of reaction? How long would it take for HSO3 to reach half its initial concentration?

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