These acids are a series of organic compounds that contain a carboxyl group (COOH), and there are a variety of methods that are used to produce them. Ethanoic acid is the most common example of a carboxylic acid. Pure water-free acetic acid (glacial acetic acid) is a colorless hygroscopic liquid and freezes below 16.7 °C (62 °F) to a colourless crystalline solid. 2 O : 2 x 16 = 32. This is done in two simplified stages. Synonyms: Ethanoic acid, Vinegar, Hydrogen acetate, Methanecarboxylic acid CAS: 64-19-7 Acetic acid is a colourless liquid organic compound. Making Ethanoic Acid. Acetic acid which is also known as Ethanoic acid is a colorless organic acid with chemicals formula C 2 H 4 O 2 is liquid with strong and distinctive pungent and sour smell. Substance name: Acetic acid. Since it has a carbon atom in its chemical formula, it is an organic compound. Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent smell. Molecular formula: C 2 H 4 O 2. Acetic acid (also known as methanecarboxylic acid and ethanoic acid) is a colourless liquid, which has a strong and pungent smell. Acetic acid is a main component of vinegar and gives vinegar its characteristic smell. Acetic acid is an organic compound with the formula CH 3 COOH. CASR number: 64-19-7. About Acetic acid. Acetic Acid Properties and Formula. Synonym: (4-Methoxybenzothioylthio)ethanoic acid, 2-[(4-Methoxyphenylthioxomethyl)thio]ethanoic acid, CTA, RAFT dithiobenzoate Empirical Formula (Hill Notation): C 10 H 10 O 3 S 2 Molecular Weight: 242.31 This acid is also known as Acetic acid ( C2H4O2 ) To find the formula mass (total mass) of the acid, take each of the elements out separately and add their mass together. 2 C : 12 x 2 = 24. Acetic acid is a colourless liquid; with a strong vinegar-like odour. Now add up the mass totals for each element to get the total mass of the acid. Acetic acid has a distinctive sour taste and pungent smell. 24 + 4 + 32 = 60 g/mol C2H4O2 The other molecular formula mentioned in the quote, HC2H3O2 does try to emphasize that there is one acidic hydrogen and 3 non-acidic hydrogens on the molecule (CH3COOH does that better.) In addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. The systematic IUPAC name of acetic acid is ethanoic acid and its chemical formula can also be written as C 2 H 4 O 2. Synonyms: Ethanoic acid, vinegar, ethylic acid, vinegar acid, methanecarboxylic acid, TCLP extraction fluid 2, shotgun, glacial acetic acid, glacial ethanoic acid. Acetic acid got its name from a word “Acetum”, which is a Latin word for vinegar. Acetic acid is an acid and the formula CH3COOH emphasizes that fact. 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