Videos relacionados con nitrogen

Nitrogen cycle

Liquid Nitrogen Explosion

A small amount of liquid nitrogen is poured into a 2-liter bottle, secured with duct tape and bricks. As the liquid nitrogen warms up, the pressure in the bottle increases, eventually rupturing it. The amount of force from the pressure is so large it can send a large volume of water relatively high for how small of the liquid N2 you put in.

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Freezing Acetone in Liquid Nitrogen

Today we're finding out what happens if you put Acetone in Liquid Nitrogen!

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Fish Survives Liquid Nitrogen Experiment

Cruel pranksters dunk a carp into a bucket of dry ice - but the lucky animal survives

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Big blood blister after liquid nitrogen cryotherapy ( 720 X 1280 )

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Dispersión molecula de nitrogéno // Scattering N2

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Morir sin dolor: Nitrogeno y argon

Este método implica la introducción de animales en un contenedor o aparato que contenga nitrógeno o un gas inerte como el argón. La atmósfera controlada producida conduce a la pérdida de conocimiento y a la muerte por hipoxia.
Las investigaciones han demostrado que la hipoxia no provoca repulsión a los cerdos ni a las aves de corral y no induce signos de insuficiencia respiratoria antes de la pérdida de conocimiento. Los contenedores o aparatos deberán permitir que las concentraciones de gas requeridas se mantengan y que la concentración de O2 pueda medirse con precisión.
Cuando se exponga al gas en un contenedor o aparato a un animal o a un pequeño grupo de animales, el material utilizado deberá estar diseñado, construido y mantenido de modo que los animales no se puedan lesionar y puedan ser observados.
Una vez que se haya llenado el contenedor o aparato con la concentración de gas requerida (<2% de O2), los animales serán introducidos y mantenidos en esa atmósfera hasta que se confirme su muerte.
Los operarios se asegurarán de que el tiempo asignado a cada lote de animales ha sido suficiente para causar su muerte antes de introducir otros animales en el contenedor o aparato. Los contenedores o aparatos no se sobrecargarán y se tomarán las medidas necesarias para evitar que los animales se asfixien trepando unos sobre otros.
Los animales no perciben el nitrógeno ni los gases inertes y la inducción de hipoxia por este método no les causa repulsión.

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Make Nitric Acid - The Complete Guide

We show 3 ways to make nitric acid based on two different chemical approaches both of which can be done using easily accessible materials.\r
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Warning: The procedures in this video produce large quantities of toxic gases and deal with highly corrosive acids. All work must be performed in a fume hood with proper safety equipment. And all apparatus must be glass to withstand the acids.\r
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Chemically, nitric acid is made by bubbling nitrogen dioxide into water. So the objective in this approach is to generate nitrogen dioxide. This can be done by reing hydrochloric acid, a nitrate salt and copper. Around 80grams of sodium nitrate, over 30 grams of copper and 100mL of hydrochloric acid (37% 12M) are the quantities needed. The ex amount isnt critical. For usable concentrations, the amount of water being converted should be small, around 20-50mL.\r
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Any source of nitrate is usable including potassium nitrate, ammonium nitrate and even nitrate-based fertilizers. You can use our previous video on testing for nitrates if you want to determine if yours can be used. \r
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The tricky part now is leading the gas into water. Two approaches are shown in the video. In the first approach three containers, such as jars are place inside each other to force the gas to go into the water. This is very inefficient but is very simple to do.\r
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The better approach is to lead the gas out of the generator through a tube and into a chilled container of water.\r
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The water thats converted into nitric acid can be replaced with hydrogen peroxide for better yield.\r
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The chemical waste thats generated contains the valuable copper used before and recovering it is worthwhile due to todays high copper prices. This is simply done by putting in enough aluminum metal that it res with all the acids and copper in solution to create a slurry of copper. This can be filtered to obtain a residue of copper. Its highly contaminated but can still be used to make more nitric acid.\r
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For further information on the chemistry type copper and nitric acid into google. The hydrochloric acid and nitrate salt behave as nitric acid (with nitrate from the salt and protons from the hydrochloric acid) and dissolve the copper releasing nitrogen dioxide gas.\r
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You can use other concentrations of hydrochloric acid but you need to decrease the amount of water added to keep the concentrations the same.\r
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Finally, the last way of making pure nitric acid is to re concentrated sulfuric acid and a pure nitrate salt (NOT fertilizer) and heat it in a glass distillation apparatus to distill over the pure nitric acid. Stoichiometric quantities of both reagents are recommended for maximum yield. \r
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We get our glassware from chemglass or VWR

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Freeze Fitting Bushings

Freeze Bushings Liquid Nitrogen

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SmogEating Roof Tile

Boral Roofing showcased its smog-eating roof tiles at the 2011 International Builders' Show.

Boral's recyclable roofing tiles neutralize nitrogen oxides using photo catalysts charged by the sun's ultraviolet rays — thereby preventing smog from forming. AvidBuilder met with Boral Roofing to learn more about this new technology.

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Fire at Moerdijk Factory Sparks Toxic Smoke Concerns

Chemi-Pack, a chemical plant in Moerdijk, Netherlands, is consumed by fire. 150 firefighters are battling the blaze. The Chemie-Pack plant stored nearly half a million liters of carcinogenic material, which raised concerns over toxic fumes as the smoke cloud from the factory fire drifted north to Dordrecht.

The chemicals contained in the smoke include nitrogen, sulfur and hydrochloric acid; present in amounts small enough not to be considered a public threat.

Moerdijk is just south of Dordrecht and Rotterdam. Dordrecht residents had been told to stay indoors with doors and windows shut, but the order has been lifted.

So far, no injuries have been reported.

Continue reading at NowPublic.com: Netherlands Factory Fire: Chemie-Pack Plant (Video) | NowPublic News Coverage http://www.nowpublic.com/world/netherlands-factory-fire-chemie-pack-plant-video-2744660.html#ixzz1ANTf1PN7

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