The reaction [2 mathrm{I}^{-}(a q)+mathrm{S}_{2} mathrm{O}_{8}{ }^{2-}(a q) longrightarrow mathrm{I}_{2}(a q)+2 mathrm{SO}_{4}{ }^{2-}(a q)] was studied at
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The reaction
\[2 \mathrm{I}^{-}(a q)+\mathrm{S}_{2} \mathrm{O}_{8}{ }^{2-}(a q) \longrightarrow \mathrm{I}_{2}(a q)+2 \mathrm{SO}_{4}{ }^{2-}(a q)\]
was studied at \(25^{\circ} \mathrm{C}\). The following results were obtained, where
\[\text { Rate }=-\frac{d\left[\mathrm{~S}_{2} \mathrm{O}_{8}{ }^{2-}ight]}{d t}\]
a. Determine the rate law.
b. Calculate the value of the rate constant for each experiment and an average value for the rate constant.
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