Monday , 25 September 2017

Chemical and Physical Reactions

Sodium polyacrylate and water

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

Fluorine reacting with hydrogen in a balloon

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A neodymium magnet falling through a copper pipe

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Magnetic field equilibrium.

A kernel of corn popping


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Deflecting a stream of water with a charged rod

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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

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

Hydrogen peroxide mixed with potassium iodide

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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

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Oxidation.

Electrical treeing

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Electrical discharge.

Water crystalizing into snow

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Firework explosion in slow motion

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Belousov–Zhabotinsky reaction

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A slowly propagating chemical oscillation containing bromine and an acid.

Lithium on fire

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A candle lit by its vapor trail

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Orange LED light immersed in liquid nitrogen

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

Flammable fluid in a glass jug

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Isopropyl alcohol, most likely.