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Chemical and Physical Reactions (16 gifs)

Sodium polyacrylate and water

Sodium polyacrylate can absorb over 200 times its mass in water.

Fluorine reacting with hydrogen in a balloon

A neodymium magnet falling through a copper pipe

Magnetic field equilibrium.

A kernel of corn popping

Deflecting a stream of water with a charged rod

You can also do this (to a lesser extent) by rubbing a balloon on your hair, then holding it next to your running sink.

Mercury(II) thiocyanate decomposition


Heating mercury(II) thiocyanate causes it to release toxic gases and decompose into an insoluble brown mass.

Hydrogen peroxide mixed with potassium iodide


The iodide catalyzes the decomposition of the hydrogen peroxide. A small amount of dishwashing soap is usually added so that the resultant oxygen is caught in the bubbles, forming a tower of foam.

Copper reacting with nitric acid


Oxidation.

Electrical treeing


Electrical discharge.

Water crystalizing into snow

Firework explosion in slow motion
Belousov–Zhabotinsky reaction

A slowly propagating chemical oscillation containing bromine and an acid.

Lithium on fire

A candle lit by its vapor trail
Orange LED light immersed in liquid nitrogen

The wavelength & frequency of the light changes as it loses thermal energy.

 Flammable fluid in a glass jug

Isopropyl alcohol, most likely.