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**Unformatted text preview: **trochemical back-titration was conducted at a current of 42.00 mA. The electrochemical back-titration reached the equiv-alence point at 2 minutes and 37 seconds. Determine the molarity of the standard ICl solution. ICl concentration = _______________ M 3. Now that the thiosulfate and ICl solutions have been standardized, we can determine the iodine number for corn oil. A 0.1000 g samples of corn oil was reacted with 10.00 mL of the standardized ICl solution. The resulting solution was over-titrated with 20.00 mL of the standardized thiosulfate solution. An electrochemical back-titration was conducted at a current of 42.0 mA; the equivalence point was reached at 2 minutes 9 seconds. Note that the formula weight of I 2 is 253.81 g/mol while the formula weight of ICl is 162.36 g/mol. Determine the iodine number (the grams of iodine per 100 grams of oil) for the corn oil. iodine number = _______________ Cornell University Chemistry 3000 — Fall 2009 J. A. Marohn...

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