Vitamin C as Reducing Agent

C6H8O6 + I2 → C6H6O6 + 2HI

Descripción general

Ascorbic acid (vitamin C) reduces iodine to iodide while being oxidized to dehydroascorbic acid. The enediol group on ascorbic acid is the active reducing center, losing two electrons. This reaction is the basis of the standard method for determining vitamin C content in foods.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Ascorbic Acid C₆H₈O₆ 1 (aq)
Reactivo Iodine I 1 (aq)

Ejemplo cotidiano

School science experiments often measure vitamin C in different juices by titrating with iodine solution until the starch indicator turns blue-black.

Importancia industrial

Ampliamente usado como antioxidante en conservación de alimentos, fotografía analógica y síntesis de nanopartículas metálicas.

Propiedades

Tipo
Redox
Reversible
No
Energía
Exotérmico
ΔH
-58,0 kJ/mol

Reacciones relacionadas

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Frequently Asked Questions

What is the equation for Vitamin C as Reducing Agent?
The balanced equation is: C₆H₈O₆ + I₂ → C₆H₆O₆ + 2HI.
What type of reaction is Vitamin C as Reducing Agent?
Vitamin C as Reducing Agent is a redox reaction.
Is Vitamin C as Reducing Agent exothermic or endothermic?
Vitamin C as Reducing Agent is exothermic (releases energy). The enthalpy change (ΔH) is -58.0 kJ/mol.