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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 · The chemical traffic light experiment is a dramatic redox reaction that changes colors between yellow or amber, green, and red. Shaking the solution then reverses the reaction, so the color change goes from red to green to yellow (like a traffic light).
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.
Watch this amazing chemical reaction as each shake of a bottle turns the liquid inside all the colors of a traffic light.
30 Ιουν 2005 · In this simple demonstration, potassium sodium 2,3-dihydroxybutanedioate or potassium sodium tartrate (Rochelle salt) is oxidised by hydrogen peroxide in the presence of cobalt (II) ions. You simply mix the hot reactants and add the catalyst.
The Traffic Light Demonstration. This page uses frames, but your browser doesn't support them.
A colorful chemical demonstration showing the oxidation/reduction reaction using indigo carmine as the indicator.
