Egyptian night at home || Egyptian night experiment do at home

It is one among the most mystical experiment. A transparent solution turns dark after a certain time. Here vitamin C reduces iodine to colorless iodide irons. However hydrogen peroxide oxidizes iodide to iodine again, forming a dark blue complex with starch.

Reagents and equipment

• Medical iodine( 5% iodine solution potassium iodide)
• 3 % Hydrogen peroxide(H₂O₂)
• 1% starch solution
• 5% Vitamin C solution(ascorbic acid)
• 9% acetic acid(vinegar)
• Beaker

Process

1. Pour vinegar into a beaker and make an acidic medium.
2. Then add medical iodine, then the solution turns to dark.
3. Add vitamin C solution, then the solution become colorless.
4. And add starch solution into the beaker as indicator.
5. Then add hydrogen peroxide solution. A dark blue iodine-starch complex is formed thus the colorless solution turns to colored.

Chemistry (Process)

Vinegar is added to create an acidic medium. Vitamin C is a strong reducer. It reduces iodine  to colorless iodide irons. Mean while  hydrogen peroxide oxidizes the iodide irons into iodine again, which react with starch to form a dark blue iodine-starch complex. The beaker become darken