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Sodium acetate

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	Sodium acetate
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	Topics Sodium acetate Topic Home Sodium acetate, (also sodium ethanoate) is the sodiumSodium Sodium is a chemical element which has the symbol Na , atomic number 11, atomic mass 22.9898 g/mol, oxidation number +1.... salt of acetic acidAcetic acid Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour ... . It is an inexpensive chemical produced in industrial quantities for a wide range of uses. Applications Sodium acetate is used in the textileTextile A textile is a flexible material comprised of a network of natural or artificial fibres often referred to as thread or yarn.... industry to neutralize sulfuric acidSulfuric acid Sulfuric acid , H2SO4, is a strong mineral acid.... waste streams, and as a photoresistPhotoresist Photoresist is a light-sensitive material used in several industrial processes, such as photolithography and photoengraving ... while using aniline dyes. It is also a picklingFacts About Pickling Pickling, or corning, is the process of preparing a food by soaking and storing it in a brine containing salt and/or a... agent in chrome tanningTanning Overview Tanning is the process of conversion of putrescible skin into non putrescible leather.This is commonly done with the acidic ... , and it helps to retard vulcanizationVulcanization Vulcanization, or curing of rubber, is a chemical process in which individual polymer molecules are linked to other polymer ... of chloropreneChloroprene Chloroprene is the common name for the organic compound 2-chloro-1,3-butadiene, which has the chemical formula C4H5Cl.... in synthetic rubberSynthetic rubber Summary Synthetic rubber is any type of artificially made polymer material which acts as an elastomer.... production. Sodium acetate is the chemical that gives salt and vinegar chipsPotato chip A potato chip or crisp is a slim slice of a potato deep fried or baked until crisp.... (crisps) their flavor. It may also be added to foods as a preservative; in this application it is usually written as "sodium diacetate" and labeled E262. As the conjugate base of a weak acid, a solution of sodium acetate and acetic acid can act as a bufferBuffer solution Buffer solutions are solutions which resist change in hydronium ion and the hydroxide ion concentration upon addition of sm... to keep a relatively constant pH. This is useful especially in biochemical applications where reactions are pH dependent. Sodium acetate is also used in consumer heating padHeating pad A heating pad is a pad used for warming of parts of the body in order to manage pain.... s or hand warmerHand warmer Hand warmers are small packets which are held in the hand and produce heat on demand to warm cold hands.... s and is also used in "hot ice". When sodium acetate trihydrate crystals (melting point 58 °C) are heated to around 100 °C, they melt. When this melt cools, it gives a supersaturated solution of sodium acetate in water. This solution is capable of supercoolingSupercooling Supercooling is the process of chilling a liquid below its freezing point, without it becoming solid.... to room temperature, well below its melting point, without forming crystals. By clicking on a metal disc in the heating pad, a nucleationNucleation Summary Nucleation is the onset of a phase transition in a small region.... center is formed which causes the solution to crystallize into solid sodium acetate trihydrate again. The bond-forming process of crystallization is exothermicExothermic ExothermicIn thermodynamics, the word exothermic describes a process or reaction that releases energy in the form of... , hence heat is emitted. The latent heat of fusion is about 264–289 kJ/kg. Preparation Sodium acetate is inexpensive, and is usually purchased from chemical suppliers, instead of being synthesized in the laboratory. It is sometimes produced in a laboratory experiment by the reaction of acetic acidAcetic acid Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour ... with sodium carbonateSodium carbonate Sodium carbonate, , is a sodium salt of carbonic acid.... , sodium bicarbonateSodium bicarbonate Sodium bicarbonate is the chemical compound with the formula NaHCO3.... , or sodium hydroxideSodium hydroxide Sodium hydroxide , also known as lye or caustic soda, is a caustic metallic base.... . These reactions produce aqueous sodium acetate, and water. Carbon dioxide is produced in the reaction with sodium carbonate and bicarbonate, and it leaves the reaction vessel as a gas (unless the reaction vessel is pressurized). CH₃–COOH + Na⁺[HCO₃]^– ? CH₃–COO^– Na⁺ + H₂O + CO₂ This is the well-known "fizzing" reaction between baking soda and vinegarVinegar Summary Vinegar is a sour-tasting liquid made from the oxidation of ethanol in wine, cider, beer, fermented fruit juice, or nearly a... . 84 grams of sodium bicarbonate react with 750 ml of 8% vinegar to make 82 g sodium acetate in water. By subsequently boiling off most of the water, one can refine either a concentrated solution of sodium acetate or actual crystals. Reactions Sodium acetate can be used to form an esterEster In chemistry, esters are organic compounds in which an organic group replaces a hydrogen atom in an oxygen acid.... with an alkyl halide such as bromoethaneBromoethane Bromoethane, also known as ethyl bromide is a chemical compound of the haloalkanes group.... : H₃C–COO^– Na⁺ + Br–CH₂–CH₃Bromoethane Bromoethane, also known as ethyl bromide is a chemical compound of the haloalkanes group.... ? H₃C–COO–CH₂–CH₃Ethyl acetate Ethyl acetate is the organic compound with the formula CH3CH2OCCH3.... + NaBrSodium bromide Sodium bromide is the chemical compound with the formula NaBr.... In such a reaction, the sodium acetate is usually complexed with Cesium in order to increase the nucleophilicity of the carboxylate group. Gallery External links