Question

How did ethanoic acid got it’s name acetic acid

Answer 1

The systematic name ethanoic acid, a valid IUPAC name, is constructed according to the substitutive nomenclature. The name acetic acid derives from acetum, the Latin word for vinegar, and is related to the word acid itself. Glacial acetic acid is a name for water-free (anhydrous) acetic acid.
Also, because melting point of pure ethanoic acid is 290 K and hence it often freezes during winter this give rise to its name glacial acetic acid.
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