User:Junsuda.d/sandbox

Chemical traffic light reaction is the name of a reaction that change color into green, red, and yellow, just like a traffic light. This reaction is the mixed of Glucose, Sodium hydroxide, Indigo carmine, and water. At the beginning, the color of the solution is yellow. The color will turn into green if we shake the solution. If we leave it without moving or touching it for about 3 seconds, the color change to red and follow by yellow.

Material
1. 5 ml of C1 Glucose. 2. 5 ml of C2 Sodium hydroxide. 3. 0.5 ml of C4 Indigo carmine.

Procedure
1. Add 50 ml of water then add C1, C2, and C4. 2. Adjust the volume of the water until it reach 100 ml. 3. Slowly shake it, then the green color will appear.