Αποτελέσματα Αναζήτησης
23 Φεβ 2023 · 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.
31 Οκτ 2021 · 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. Dissolving a small amount of oxygen by lightly swirling the flask turns the liquid red.
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.
5 Μαΐ 2014 · Indigo carmine itself acts as both a pH and redox indicator. Below pH 11.4 we see the initial blue colour. It has a yellow form above pH 13, but at intermediate pH takes on a green hue.
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.
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.
