Vitamin C as Reducing Agent

C₆H₈O₆ + I₂ → C₆H₆O₆ + 2HI

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท	สาร	สัมประสิทธิ์	สถานะ
สารตั้งต้น	Ascorbic Acid C₆H₈O₆	1	(aq)
สารตั้งต้น	Iodine I	1	(aq)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

Vitamin C iodimetric assay is a standard pharmaceutical quality control method. Ascorbic acid's antioxidant action in food is based on its reducing properties.

คุณสมบัติ

ประเภท: Redox
ย้อนกลับได้: ไม่
พลังงาน: คายความร้อน
ΔH: -58.0 kJ/mol

ปฏิกิริยาที่เกี่ยวข้อง

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Hydrogen Peroxide Disproportionation Displacement of Hydrogen from Acid by Magnesium

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.