Homework Help: chemistry

Posted by saddee on Tuesday, April 28, 2009 at 4:40pm.

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?

chemistry - DrBob222, Tuesday, April 28, 2009 at 5:49pm
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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