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Topic: I2 and ascorbic acid, 1:1 ratio?  (Read 2718 times)

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Offline MissDee

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I2 and ascorbic acid, 1:1 ratio?
« on: November 14, 2010, 10:41:19 PM »
C6H8O6 + I3- + H2O  :rarrow: C6H6O6 + 3I- + 2H+

Does this mean that the moles of I2 added is equal to the moles of ascorbic acid in the sample? Ie, is it a 1:1 ratio? Then what is the significance of the 3 moles of I2 formed as a product?

Offline Fluorine

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Re: I2 and ascorbic acid, 1:1 ratio?
« Reply #1 on: November 14, 2010, 11:07:29 PM »
There is no iodine (I2) on either side of the chemical reaction you supplied. I3- is triiodide ion and I- is iodide ion.

According to the reaction 1mol ascorbic acid, 1mol triiodide ion, and 1mol water will form 1mol dehydroascorbic acid, 3mol iodide ion, and 2mol protons/hydrogen ion. Yes triiodide and ascorbic acid are 1:1, the 3mols I- is because the triiodide is split up during the reaction.

Hope this helps.
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