. A sample of fresh grapefruit juice was filtered and titrated with the above I2 solution. A 100 mL sample of the juice took 9.85 mL of the iodine solution to reach the starch endpoint.
a) What is the concentration of vitamin C in the juice in mg vitamin C/100 mL of juice (mg/ 100 mL)?

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  1. And what, pray tell, is the molarity of the I2 solution used. As posted this is not workable.

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