Boiling an egg – with chemistry! @melchemistry7035

Uploaded December 2019 | Updated September 2026, 1 week ago

Watch out – here comes an extremely hot experiment!
Reagents and equipment: egg, heat-resistant bowl, calcium oxide, water.
Pour some calcium oxide into a heat-resistant bowl. Place an egg on top and press it slightly into the powder. Fill the bowl with water. The mixture quickly heats up and boils. When the reaction stops and the mixture cools down, retrieve the egg and rinse it with water. Peel and cut the egg — it’s now perfectly hard-boiled! Do not eat eggs prepared with this method; they may contain chemicals.
The formation of new chemical bonds sometimes releases a large amount of energy in the form of heat and occasionally light. Reactions that release heat into the surrounding environment are called exothermic reactions. Water reacts with calcium oxide to form calcium hydroxide.
СаО + Н₂О = Са(ОН)₂ + Q
During this reaction, so much heat is released that the liquid boils and the egg is cooked.
This experiment is dangerous. But you can find many more cool, safe experiments in the MEL Chemistry subscription!
Safety precautions: Warning! All experiments portrayed in this video are performed by professionals. Do not attempt.

$DIY optical illusions Awesome optical experiments with water and oil! Equipment: glass, water, vegetable oil, drawings. Place a coin in a cup so that it isnt in your line of sight. Just add water, and the coin will appear! Draw two horizontal arrows pointing in opposite directions. Place an empty glass in front of them. Fill the glass with water – the arrows change directions! You can achieve an equally amazing effect by drawing diagonal stripes or a chessboard. Wow! Optics is awesome! Refraction is a phenomenon by which a wave, such as light, changes directions when transitioning from one medium to another. Different light-transmitting media have different optical densities, and therefore light travels through them at different speeds. The higher a medium’s optical density, the slower light travels through it. Refraction is everywhere, and we perceive it as completely normal: you can see how a straw in a glass of oil “breaks” at the border between the liquid and the air. Due to its shape, a glass of water acts as a lens capable of flipping an image. This creates stunning optical illusions. The refraction of light at the boundary of two media creates a paradoxical visual effect: objects overlapping both media appear refracted upward in the denser medium, while a ray of light entering a denser medium “refracts downward.” This effect causes bodies of water to seem shallower than they actually are. The refraction of light through glass or water is perhaps the simplest and most obvious example of beam distortion, but the laws of refraction apply to any waves – electromagnetic, acoustic, and even ocean waves. Safety precautions: None.$