Top 10 Cool Chemical Reactions
10.Briggs-Rauscher Oscillating Clock
This chemical reaction is amazing because it involves a cyclic color change. A colorless solution cycles through clear, amber, and deep blue for several minutes. Like most color change reactions, this demonstration is a good example of a redox reaction or oxidation-reduction.
9.Dancing Gummi Bear Reaction
The Dancing Gummi Bear is a reaction between sugar and potassium chlorate, producing violet fire and a lot of heat. It's an excellent introduction to the art of pyrotechnics because sugar and potassium chlorate are representative of a fuel and oxidizer, such as you might find in fireworks. There's nothing magical about the Gummi Bear. You can use any candy to supply the sugar. Depending on how you perform the reaction, you may get more of an immolation than a bear tango. It's all good.
8.Elephant Toothpaste Reaction
The elephant toothpaste reaction is the decomposition of hydrogen peroxide, catalyzed by the iodide ion. The reaction produces a ton of hot, steamy foam, plus it can be colored or even striped to resemble certain toothpastes. Why is it called the 'elephant toothpaste reaction'? Only an elephant tusk needs a strip of toothpaste as wide as the one produced by this amazing reaction!
7. Fire Starter
Add glycerol on top of potassium permanganate Stand back, After 30 sec the reaction mixture will burst into a flame If larger crystals of potassium permanganate are used the reaction is much slower.
6. Potassium in Water
A reaction of potassium metal with water. Hydrogen is liberated that burns with a pink/lilac flame, the flame color owing to burning potassium vapour. Strongly alkaline potassium hydroxide is formed in solution
5. Copper to Silver to GOLD
A ‘copper’ coin is dipped into a solution of sodium zincate in contact with zinc. The coin is plated with zinc and appears silver in colour. The plated coin is held in a Bunsen flame for a few seconds and the zinc and copper form an alloy of brass. The coin now appears gold.
4. Money on Fire
A combustion reaction occurs between alcohol and oxygen, producing heat and light (energy) and carbon dioxide and water.
C2H5OH + 3 O2 → 2 CO2 + 3 H2O + energy
When the bill is soaked an alcohol-water solution, the alcohol has a high vapor pressure and is mainly on the outside of the material (a bill is more like fabric than paper, which is nice, if you've ever accidentally washed one). When the bill is lit, the alcohol is what actually burns. The temperature at which the alcohol burns is not high enough to evaporate the water, which has a high specific heat, so the bill remains wet and isn't able to catch fire on its own. After the alcohol has burned, the flame goes out, leaving a slightly damp dollar bill.
3. Glasses
From water to liquor to milkshake to soft drink.
1st glass: Sodium carbonate
2nd glass: 2-3 drops phenolphthalein
3rd glass: BaCl2
4th glass : few ml K2Cr2O7/ HCl
2. Water Gun
Making a flashlight with a water gun. Mix 0.7 AgNO3 with 1 g fine ground Mg. Water is added to make atoms and ions to collide fast enough. So:
Mg + 2AgNO3 = Mg(NO3) 2 + 2Ag
1.The hidden message
Window cleaner on phenolphthalein message
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