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Fizz is produced because when the vinegar reacts with the baking soda, it form carbon dioxide gas which is the fizz

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Copper sulfate and sodium carbonate react to form a light blue fluff.

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This works and forms new substances because both chemicals outer shells get complete and they get "happy" and make a bright light. Then the substances make a precipitate which is salt.

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Sodium and Chlorine Reaction - The making of table salt

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Precipitation Reaction: Copper Sulfate and Sodium Carbonate

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The maillard reaction combined with fats make bacon smell good. Some of the hydrocarbons (Hydrogens and carbons chained together) and aldehydes (Carbon that bonds with oxygen and hydrogen) in the bacon also smell good.

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Alkali sodium hydroxide was put in a test tube. The mixture is heated and then shaken and it forms soap.

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When the chemicals mix, they cause a temperature decrease. This happens because energy is absorbed during the reaction

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"Cool" Reaction: Ammonium Thiocyanate and Barium Hydroxide Octahydrate

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Because of the chemicals mixed into the water before, when the potassium permanganate was added, the solution turned from violet, to dark blue, to blue green, to lighter and lighter green, to orange.

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Four Colour Change Reaction (Chameleon Chemical Reaction)

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Different colors are produced when the fireworks explode.

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The liquid evaporates as the carbon dioxide escapes. The liquid is cooled because the evaporation absorbs heat.

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Alka Seltzer tablets have solid sodium bicarbonate and citric acid. When it reacts with water, sodium citrate, carbon dioxide, and water are formed and the water

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U.S. Customs & Border Protection Laboratories

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What's more exciting than watching fireworks explode in a bright cacophony of color? Learning about the chemical processes that make it happens, of course! Join Chris Mocella, a tenured chemist at the U.S. Customs & Border Protection Laboratories, as he explains the chemistry behind the color in fireworks.

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Watch from 30 seconds till minutes

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Making of soap | chemical reactions | Chemistry

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Soaps are formed when fatty acids react with an alkali. The reaction is called saponification. The video shows how to make soap. An alkali, sodium hydroxide, is taken in a test tube. Some vanaspati is added to the test tube and the mixture is heated.

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Baking Soda with Vinegar (Endothermic Reaction)

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Baking Soda contains sodium bicarbonate while vinegar is an acid. This reaction between an acid and a carbonate results in a decrease in temperature as seen from the video. How much did the temperature decrease by? What are the two characteristics of an endothermic reaction? Can you give another example of an endothermic reaction?

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The marshmallow is being burned, and it creates a new aroma which is a chemical change. It has a burning sugary smell.

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When the 2 chemicals are mixed, they form a precipitate which is a solid. This happens beaus one of the chemicals used to be a part of paint and the other ones helps it react.