2CLabManual201303

Please enter the average molarity using three

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Unformatted text preview: ge of the three trials. Please enter the average molarity using three significant figures. Please enter the standard deviation of the sodium thiosulfate molarity. 5 The following series of questions pertains to Part II of the Redox Titration Experiment, where you are to calculate the mass percent of sodium hypochlorite in your sample of bleach. For the reaction of hypochlorite anion with iodide anion, the iodide anion acts as the reducing agent according to the oxidation half-reaction, 2 I-(aq) I2(aq) + 2e-. Which of the following reduction half-reactions is correct to give the overall reaction of hypochlorite anion with iodide anion? Three choices will be given. For the reaction of thiosulfate anion with iodine, the thiosulfate anion acts as the oxidizing agent according to the oxidation half-reaction, 2 S2O32-(aq) S4O62-(aq) + 2e-. Which of the following reduction half-reactions is correct to give the overall reaction of thiosulfate anion with iodine? Three choices will be given. Notice that the effective analytical connection for analysis of hypochlorite anion by the thiosulfate anion in this experiment is the sum of the two reactions: 1) hypochlorite anion with iodide anion to form iodine, and 2) thiosulfate anion with the iodine form...
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