Praktikum Redoks pada Betadine dengan Vitamin C

Redox Reaction Fundamentals
📌 Redox reactions involve coupled reduction and oxidation processes, where reduction leads to a decrease in oxidation number (biloks), loss of oxygen, or gain of hydrogen.
🔬 Oxidation is defined as an increase in biloks, gain of oxygen, or loss of hydrogen in a compound.
🧪 The experiment aims to demonstrate redox reactions between Betadine (iodine) and Vitamin C (ascorbic acid).

Experimental Procedure and Observation
🧪 Materials required include water (250 mL), plastic spoon, Betadine, Vitamin C, and a glass.
💧 Adding 20 drops of Betadine to 250 mL of water causes the solution to change color to reddish-brown due to the presence of iodine ($\text{I}_2$).
✨ When one tablet of Vitamin C is added and stirred, the reddish-brown solution immediately turns colorless.

Chemical Explanation of the Reaction
⚛️ Betadine solution is reddish-brown because it contains iodine ($\text{I}_2$).
🍋 Vitamin C contains ascorbic acid with the formula $\text{C}_6\text{H}_8\text{O}_6$.
🔄 The colorless result occurs because the ascorbic acid in Vitamin C is oxidized by iodine ($\text{I}_2$), causing the iodine to be reduced to iodide ions ($\text{I}^{-}$).
📈 Oxidation: Carbon ($\text{C}$) in ascorbic acid undergoes oxidation, with its biloks increasing from $+2\frac{2}{3}$ to $+1$.
📉 Reduction: Iodine ($\text{I}_2$), an element with a biloks of $0$, is reduced to $\text{I}^{-}$ (biloks $-1$).

Key Points & Insights
➡️ This simple home experiment effectively visualizes a redox reaction using easily accessible household items: Betadine and Vitamin C.
➡️ The disappearance of the reddish-brown color signifies that the iodine has been chemically changed (reduced) by the ascorbic acid present in Vitamin C.
➡️ Remember the oxidation state changes: Carbon goes from $+2\frac{2}{3}$ to $+1$ (oxidation), and Iodine goes from $0$ to $-1$ (reduction).

📸 Video summarized with SummaryTube.com on Jan 27, 2026, 11:48 UTC