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Write the balanced reaction equation for the oxidation of ascorbic acid (C6H8O6) by triiodide ion (I3−)...

Write the balanced reaction equation for the oxidation of ascorbic acid (C6H8O6) by triiodide ion (I3−) in acidic medium to produce dehydroascorbic acid (C6H6O6) and I−.

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Answer #1

Ascorbic acid (vitamin C) is a antioxidant and is a important part of human nutrition. The redox titration is used for the determination of amount of vitamin C present in the food .

Iodine reacts with iodide to form triiodide ion

I2 + I → I3-

Triiodide ion further reacts with ascorbic acid to form dehydroascorbic acid. Here is the balance equation for ascorbic acid oxidation.

C6H8O6 + I3- + H2O → C6H6O6 + 3I- + 2H+

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