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31 Οκτ 2021 · The chemical traffic light is an example of a clock reaction. Indigo carmine is a redox indicator that changes from blue in water to green in the alkaline glucose solution. Shaking the solution dissolves oxygen from air into the liquid and oxidizes indigo carmine.
15 Αυγ 2020 · Principle: This demonstration involves a reversible oxidation-reduction reaction between I.C., oxygen (O 2), and a reducing sugar. I.C. is a both a pH and a redox indicator; the oxidized form is blue below pH 11.4, yellow above pH 13, and green in the intermediate range, while the reduced form is yellow at all pH levels.
23 Φεβ 2023 · Indigo carmine undergoes a reversible reduction. Shaking the flask brings more oxygen into the solution, provoking the formation of the oxidized (green) form. The indigo carmine will eventually undergo reduction again to its reduced (yellow) form.
The chemical traffic light is a stunning colorful reaction! The experiment involves changing colors with an indicator – indigo carmine in an alkaline solution of glucose.
5 Μαΐ 2014 · Using indigo carmine to produce a range of stunning colours The ‘blue bottle’ demonstration is one of the most well-known and best-loved chemistry demonstrations. A flask containing a colourless liquid (consisting of an alkaline solution of glucose and methylene blue) is shaken.
29 Σεπ 2020 · Also known as the traffic light reaction, indigo carmine produces a colorful demonstration. In this activity, a redox indicator (indigo carmine) changes color as a result of electron transfer. The introduction of oxygen through swirling causes the indigo carmine to turn green as it is oxidized.
Chemical Concept Demonstrated: Reversible oxidation-reduction reactions. Demonstration: Indigo carmine is added to a 1:1 mixture of ethanol and water. KOH is dissolved in water, dextrose (glucose) is added to this solution, along with the indicator solution.
