Four Color Change Reaction Description Four Colour Change Reaction (ChameleonChemical Reaction

Chameleon Chemical Reaction
Introduction:
Chameleon chemical reaction is redox reaction which show a beautiful colour change. During the reaction, the colour is change from 1. violet 2. green 3. yellow 4. red.
Procedure:
1.Prepare a breaker with 500ml warm water
2.Start the magnetic stirrer
3. Add 6 grams sodium hydroxide
4.Add 9 grams sucrose (sugar)
5.Prepare the potassium permanganate solution by adding 30mg of potassium permanganate into 30ml of water
6.Add potassium permanganate solution into the breaker and watch the colour change.
Principal:
ХPermanganate MnO4 is reduced by sucrose under alkaline environment.During the reaction, KMnO4(violet) is reduced toK2MnO4(green), then it further reduced to MnO2 (brown/ yellow)
Notes:
1.Sodium hydroxide is corrosive, please be careful when you use it.
2.Magnetic stirrer is not a must but it will mixed the solution faster.
3.If more sucrose is added, the colour change will be faster.
4. If more potassium permanganate is added, the reaction will start with dark violet and it is not easily to see the colour change.
5.If less potassium permanganate is added, the final colour may be yellow but not red.