Nature Expands To Become Teacher: Amazing Reaction To Chemistry

Who says Chemistry is boring? Precisely chemistry is amazing. As nature expands to become a teacher, below presented some interesting chemical demonstrations in the form of gif, and hopefully make you become encouraged to study chemistry.

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1). Spoon missing

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We see in the animated picture above, a metal spoon used to stir water, suddenly losing its shape. Is the water an acid solution?

Not at all! The water above is the usual warm water, but the spoon is not the usual metal spoon. The spoon above is made of a metal element called Gallium. Gallium is a metal element whose melting point is only 29 degrees Celsius. And this metal when we hold it long enough with the hand, it will melt.

Even if a liquid Gallium is put into a can of aluminum beverage, then after half an hour the aluminum structure of the can is damaged and makes it easy to tear it by the hand, like tearing up a wet wipes, like the animation below:

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2). Hot Ice

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In the animation above, we see a piece of ice cubes dipped in a glass of water, and suddenly the water instantly freezes! Why is that?

Ice cubes are indeed ordinary ice, but the liquid in the glass, is not ordinary water, but is sodium acetate. Sodium acetate has supercooling properties, which means that sodium acetate remains in liquid form even though it has cooled below its freezing point.

Crystallization or changes in liquid form to solid will quickly occur if we disturb this sodium acetate by just touching the surface with fingers, spoons and others. Or by pouring it. So giving ice to the animation above is just an attempt to outwit the people who see it.

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Crystallization is an example of an exothermic process. Heat is released when ice is formed, that's why sodium acetate is also called 'Hot Ice'. To demonstrate supercooling, crystallization, and heat release, we can do:

Touch or drop something into the cooled sodium acetate solution container. Sodium acetate will crystallize in seconds, its crystallization starting from the point where we touch it. Crystals act as nucleation sites or seeds for rapid crystal growth. Although the solution has just come out of the cooling machine, if we touch the container, it will feel warm or hot.

Pour the solution onto a small plate. If the hot ice does not start spontaneously crystallization, you can touch it with a sodium acetate crystal (can be obtained by scraping a small amount of sodium acetate from the side of the container used previously). Crystallization will lead to which direction you pour the liquid. You can build a hot ice tower. The tower will warm to the touch. You can re-melt and reuse it for a demonstration.

3). Nitrogen Triiodide

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Nitrogen triiodide is an inorganic compound with the formula NI3. This is a very sensitive contact explosive: a small amount of this substance will explode violently, when touched even by a light touch like feathers, releasing a violet cloud of iodine vapor. Nitrogen triiodide can even be detonated by alpha-ray radiation. NI3 has a complex chemical structure that is difficult to learn due to derivative instability.

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Nitrogen triiodide is so dangerous that the person demonstrating in the picture above wears the protector and from the distance it feels safe. This is very dangerous if done in your own home.

4). Elephant Toothpaste

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Take a large cylinder (500 ml) and place about 50 mL of 30% hydrogen peroxide solution into it. Add dishwashing liquid soap. Then add a teaspoon of potassium iodide powder and put it. Reactions:

2 H2O2 (aq) O2 (aq) + 2 H2O (aq)

A bubble of oxygen and soap bubbles will rise rapidly from inside the cylinder and outwards, like toothpaste coming out of the tube. If we give a little food coloring under the cylinder side before we add iodide, the foam coming out of the tube will be striped like a toothpaste.

You may wonder why there is no iodide in the above reaction. Iodide acts as a catalyst, which speeds up the reaction without being produced or consumed in the reaction. Manganese dioxide can also be used as a catalyst.

This demonstration is potentially dangerous. Wear gloves and sunglasses. A 30% hydrogen peroxide solution can cause serious burns and eye damage. Can also whiten hair and clothes. If you add too much iodide, the peroxide will spray very hard from the top of the tube and will hit you and the whole room.

5). Polymerization Of Nitroaniline

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In the above animation, about 1/2 teaspoon of nitroanline (short for nitroaniline, also called 4 nitroaniline) is treated with a few drops of concentrated sulfuric acid, in a ceramic dish, heated over the stove. About 50 seconds later, a reaction that could be described as a "polymerization explosion" occurred.

6). A fast fire extinguisher

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This can be used in an emergency. Carbon tetrachloride or CCl4 can quickly extinguish the fire by using all available oxygen (because it requires oxygen for its own reaction, thus preventing the fire from reaching oxygen at the molecular level). This is not a new technology. CCl4 is generally used to extinguish the fire in the first half of the 20th century, but is now not used anymore because they are very dangerous.

Once it is known that high temperatures cause will react to produce phosgene making it very dangerous when used against fire. This reaction also causes the depletion of oxygen. Carbon tetrachloride survived as a pesticide to kill insects until in 1970, this substance was banned in the United States.

Prior to the montreal protocol, large amounts of carbon tetrachloride were used to produce refrigerant freon R-11 (trichlorofluoromethane) and R-12 (dichlorodifluoromethane). However, this refrigerant plays a role in ozone depletion and has been removed. Carbon tetrachloride is still used to produce less destructive refrigerants. Carbon tetrachloride has also been used in neutrino detection.

Carbon tetrachloride is one of the most potent hepatotoxins (toxic to the liver), and is widely used in scientific research to evaluate hepatoprotective agents.

Reference:

http://www.chegg.com/homework-help/questions-and-answers/consider-following-reaction-2-h2o2-aq-2-h2o-l-o2-aq-reactant-oxidized-oxidizing-agent-reac-q885275

http://chemistry-reference.com/reaction.asp?rxnnum=326

http://terselubung.in/

How? are you interested in playing with chemistry? incredible is not it! this is the uniqueness of the chemicals, in its harmful form, it can also be useful in other fields. I am @manah. greetings of the world of steemit and greetings of knowledge.