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A $0.8870-\mathrm{g}$ sample of a mixture of $\ma…
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Problem 139 Medium Difficulty

Sulfites (compounds containing the $\mathrm{SO}_{3}^{2-}$ ions) are used as preservatives in dried fruit and vegetables and in wine making. In an experiment to test the presence of sulfite in fruit, a student first soaked several dried apricots in water overnight and then filtered the solution to remove all solid particles. She then treated the solution with hydrogen peroxide $\left(\mathrm{H}_{2} \mathrm{O}_{2}\right)$ to oxidize the sulfite ions to sulfate ions. Finally, the sulfate ions were precipitated by treating the solution with a few drops of a barium chloride $\left(\mathrm{BaCl}_{2}\right)$ solution. Write a balanced equation for each of the preceding steps.

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Gay question 139, with peroxide hydrogen peroxide itinerate more. I.

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Raymond Chang, Kenneth A. Goldsby

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