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NBS, or N-bromosuccinimide has two components when reacting with ascorbic acid, an oxidation and a reduction component. Oxidation of ascorbic acid is C6H8O6 - -> C6H6O6 + (2H+) + 2e and the reduction of NBS is C4H4BrNO2 + (2H+) + 2e --> C4H5NO2 + HBr. Combining them, the full stoichiometric equation is C6H8O6 + C4H4BrNO2 --> C6H6O6 + C4H5NO2 + HBr. In this instance, all coefficients are 1.

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Q: What it the stoichiometry of the reaction between NBS and ascorbic acid?
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