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The chemical traffic light is the reaction of the changing in color of the solution which also related to the blue bottle experiment. The chemical traffic light is the reaction of mixed between glucose, sodium hydroxide, indigo carmine, and water. When the solution is shaken, the colors that appear in this reaction are green, red, and yellow. This reaction can be repeated many times but it need to add more oxygen or indigo carmine. At first, all chemicals were added together and the color appeared yellow. After shaking was done, the color turned green and then changed to red after it was left untouched. When further observed, the color turned back to yellow, which is why the solution is called the chemical traffic light. ==Chemical reaction== When the solution is shaken, oxygen dissolves in the solution and oxidizes indigo carmine. Solution becomes red if a small amount of oxygen is dissolved, and green if all of indigo carmine is oxidized.〔(【引用サイトリンク】url=http://practicum.melscience.com/experiments/chemical-traffic-light.html )〕 File:Chemical traffic light (yellow).JPEG|Yellow (reduced form) File:Chemical traffic light (green).JPEG| Green (oxidized form) File:Chemical traffic light (red).JPEG|Red File:Chemical traffic light (yellow).JPEG|Yellow (reduced form) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The chemical traffic light」の詳細全文を読む スポンサード リンク
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