Chemistry - Redox Reactions Question with Solution | TestHub

A sample of raw material contain ${\mathrm{NaNO}}_3$ and ${\mathrm{NaIO}}_3$. The ${\mathrm{NaIO}}_3$ can be used as a source of iodine, produced in the following reactions:

${\mathrm{IO}}_3{}^{-}+{\mathrm{HSO}}_3{}^{-}⟶{\mathrm{I}}^{-}+{\mathrm{SO}}_4{}^{2-}$ (1)

${\mathrm{I}}^{-}+{\mathrm{IO}}_3{}^{-}⟶{\mathrm{I}}_2+{\mathrm{H}}_2\mathrm{O}\dots \left(2\right)$

(2)

One liter of sample solution containing $396g$ of ${\mathrm{NaIO}}_3$ is treated with a stoichiometric quantity of ${\mathrm{NaHSO}}_3$. Now a substantial amount of the same solution is added to the reaction mixture to bring about reaction (2) to completion (Molar mass: $\mathrm{I}=127$, $\mathrm{Na}=23$, $\mathrm{S}=32$, $\mathrm{O}=16$).

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