Writing Assignment 9.docx - Calculation to confirm 10 mg...

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Calculation to confirm 10 mg:0.01136 M * 0.005 L = 5.68 * 10-5moles of Ascorbic acid5.68 * 10-5moles of Ascorbic acid * 176.124gof Ascrobic acid1moleof Ascorbic acid= 0.0100 g or 10.0 mgDetermination of amount of vitamin C in medium peachExperiment plan: The plan for this experiment is to titrate a solution of peach, HCl, KI, and starch with a titrant of KIO3in order to calculate the amount of ascorbic acid in a medium peach. First a calculation needs to be performed in order to determine if 5.00 mL of ascorbic acid equals 10 mg of ascorbic acid. Then a stock solution of KIO3was made with molarity 0.002 M in a 100 mL volumetric flask. After the titration, the moles of I2produced equals the moles of ascorbic acid. Once the moles of ascorbic acid are calculated, then the mg and g of ascorbic acid can be determined. The same steps used to determine the mg of ascorbic acid in the first titration are used again to determine the amount of ascorbic acid in a medium peach.

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