A sample of fresh grapefruit juice was filtered and titrated with the I2 solution prepared in Part 2. A 100.0 mL sample of the juice took 9.85 mL of the iodine solution to reach the starch end point.

What is the concentration of Vitamin C in 100ml juice?

What quantity of juice will privide the RDA amount of vit C?

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  1. I don't now anything about part A.
    Grams vitamin C in the 100 mL =
    Liodine x Miodine x (1 mol I2/1 mol vit C) x molar mass vit C = grams vit C.
    You can take the concn from there and look up the RDA value and calculate that form the concn.

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