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2 Ιαν 2017 · Indigo carmine can exist in oxidized (loss of electron), reduced (gain of electron) and intermediate forms. Each form has a slightly different structure which means that each structure absorbs...
A colorful chemical demonstration showing the oxidation/reduction reaction using indigo carmine as the indicator.
28 Απρ 2021 · The interplay between the kinetics of oxidation by oxygen and reduction by glucose are used to interconvert the organic dye, indigo carmine, between red, yellow, and green forms.
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.
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.
4 Μαΐ 2017 · For this experiment you would need: - Dye called indigo carmine 0.05g. - Caustic soda (Sodium hydroxide) 2.5g. - Glucose (dextrose) 1.5g. - Water 125 ml. If the colours stop changing, just open the bottle for more oxygen to get inside and add a bit more of indigo carmine. #TheDadLab #science #experiment #chemistry.
