Acetic acid is a colourless liquid organic compound with the chemical formula CH3COOH. It is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. The name acetic Acid derives from acetum, the Latin word for vinegar.
About Acetic acid in brief
Acetic acid is a colourless liquid organic compound with the chemical formula CH3COOH. When undiluted, it is sometimes called glacial acetic acid. Acetic acid has a distinctive sour taste and pungent smell. It is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. The name acetic Acid derives from acetum, the Latin word for vinegar, and is related to the word acid itself. In aqueous solution, it has a pKa value of 4. 76. Its conjugate base is acetate. A 1.0 M solution has a pH of 2. 4, indicating that merely 0. 4% of the aceticacid molecules are dissociated. In very dilute solution, the molecules form chains, individual molecules being interconnected by hydrogen bonds at 120°C. In solid phase, dimers can be detected in the vapour phase in the dilute solutions in non-hydrogen-bonding solvents. Other carboxylic acids engage in similar intermolecular bonding interactions with hydrogen. The global demand for acetic acids is about 6. 5 million metric tons per year, of which approximately 1. 5 Mta is met by recycling; the remainder is manufactured from methanol. The hydrogen centre in the carboxyl group can separate from the molecule by ionization: Because of this release of the proton, acetic acidic has acidic character.
In biochemistry, the acetyl group is fundamental to all forms of life and is central to the metabolism of carbohydrates and fats. Acetate can also refer to a salt containing this anion, or an ester of acetics acid. In the food industry, acetate is controlled by the food additive code E260 as an acidity regulator and as a condiment. It can also be used as a descaling agent in the manufacture of synthetic fibres and fabrics, and in the production of wood glue and photographic film. The chemical formula is often written as CH3–COH, CH3−COH and CH3CO2H, to better reflect its structure. The trivial name is the most commonly used and preferred IUPAC name. The systematic name ethanoic acid is constructed according to the substitutive nomenclature. It comes from the ice-like crystals that form slightly below room temperature at 16. 6 °C . A common symbol for AcOH is AcOH, where Ac is the pseudoelement symbol representing theacetyl group CH3+C−; the conjugates base, acetate, is thus represented as AcO−. In the context of acid-base reactions, the abbreviation HAc is sometimes used, where Ac in this case is a symbol for acetate . Acetates is the ion resulting from loss of H+ from acetic acid.
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