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The vanishing valentine experiment is a type of chemical reaction related to the blue bottle experiment. This reaction is occurs by mixing water, glucose, sodium hydroxide, and resazurin in the water bottle. When the solution is shaken, it will turn from light blue to redish color and turn back to light blue after leaving still for a while. This reaction can be repeated many times without having to add the solution again.〔(【引用サイトリンク】url=http://chemistry.about.com/od/valentinesdaychemistry/a/Vanishing-Valentine-Chemistry-Demonstration.html )〕 After mixing all the components, shake the bottle and the color will turn to red or pink depend on the amount of resazurin in the solution. More resazurin will result in more time needed for the solution to turn back the color and the intensity of the red color. ==Chemical reaction== Glucose reduce resazurin to resorufin which will then be reduced again to a colorless compound dihydroresorufin. When dihydroresorufin is shaken, it is oxidize back to resorufin because when shook, the oxygen in the bottle will oxidize dihydroresorufin and make it back into resorufin.〔(【引用サイトリンク】url=http://www.flinnsci.com/documents/demopdfs/chemistry/cf0667.00.pdf )〕 File:Vanishing valentine before shook.JPG| reduced color of the experiment File:Vanishing valentine after shook.JPG| oxidized color of the experiment 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「Vanishing valentine experiment」の詳細全文を読む スポンサード リンク
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