discussion exp9 - James Riddle Jr39592 Experiment 9...

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James Riddle Jr39592 Experiment 9 – Analysis of the Oxidizing Capacity of Bleach Desai, K The first objective of this experiment was to perform a titration of a sample of bleach with thiosulfate. The next objective was to determine the end point of the titration with starch indicator as well as the oxidizing capacity of the unknown sample of bleach. The oxidizing capacity was found by determining the effective percentage by mass of the bleach that is sodium hypochlorite. Finally, the last objective was to balance and summarize the two redox reactions to determine the overall chemical reaction that occurred during the titration. (1) The effectiveness of the bleach is dependent upon the oxidizing strength of an oxidizing agent such as hypochlorite ion. This ion is usually present in bleach as a sodium salt or a calcium salt. (2) To determine the oxidizing capacity of the bleach, two oxidation-reduction reactions are required. An excess of iodide ions are mixed with a bleach solution to start the reaction. The iodide ions each lose an electron after the solution has been acidified. The oxidized iodine that is created is then titrated with sodium
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discussion exp9 - James Riddle Jr39592 Experiment 9...

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