Innovating Science™ Chemistry Demonstration Kits: Reduction-Oxidation Rainbow

Description

Rainbow reaction colorfully demonstrates an oscillation reaction.

In this demonstration, hydrogen peroxide is added to a colorless solution of potassium iodide and a red color is produced. But when hydrogen peroxide is added to a purple solution of potassium permanganate, the solution becomes colorless! What causes these dramatically different color changes? The explanation lies in the fact that hydrogen peroxide can behave as an oxidizing agent or a reducing agent, depending on the circumstances. Hydrogen peroxide oxidizes iodide ion to iodine. However, in the presence of a strong oxidizer such as potassium permanganate, hydrogen peroxide becomes a weak reducing agent, reducing the permanganate ion to the manganese ion plus oxygen.

Specifications

• Certifications/Compliance: DOT Info: Small quantity exemption 173.4. This package conforms TO 49 CFR 173.4 for domestic highway or rail transport only.
• Product Type: Reduction-Oxidation Rainbow Demonstration Kit
• Color: White
• Grade: 7 to 14
• Age: 13 to 20
• For Use With (Application): Redox Reactions
• Includes: 1 x 100 mL hydrogen peroxide, 3% solution, 1 x 200 mL potassium iodide, 0.1 m solution, 1 x 200 mL potassium, permanganate, 0.02 m solution, 1 x 10 mL sulfuric acid, concentrated un1830
• Quantity: 1
• Dimensions (L x W x H): 6 x 4.25 x 6.875 in.
• Class Size: 2 Lab Groups