Hypochlorite in Bleach - Hypochlorite in Bleach by Irina...

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Hypochlorite in Bleach by Irina Starkova Lab Instructur: Hasan Arslan October 8 th , 2009
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Irina Starkova Report Results and Discussion The goal of this experiment was to determine the molarity of hypochlorite in Clorox brand bleach with the use of the following redox reactions: hypochlorite ion molarity [OCl]-(aq) + 2I-(aq) + 2[H30]+(aq) → I2(aq) + [Cl]-(aq) + 3H20(l) I2(aq) + 2[S203]2-(aq) → 2[I]-(aq) + [S406]2-(aq) A titration using 0.1 M thiosulfate was set up to determine the volume (and moles) of thiosulfate ions needed to completely react with the iodine solution. The moles of thiusulfate could be used to determine the number of moles of iodine, and the number of moles of iodine could be used to determine the number of moles of hypochlorite (and thus the molarity of hypochlorite in the bleach sample.) The volume of the thiosulfate ions necessary to titrate the given amount of iodine was determined twice by calculating the difference volume of thiosulfate in the buret before and after the titration. The results were as follows:
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This note was uploaded on 11/05/2009 for the course CHEM 2070 at Cornell University (Engineering School).

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Hypochlorite in Bleach - Hypochlorite in Bleach by Irina...

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