Naming binary acids

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Acids are hydrogen-containing compounds that yield hydrogen ions (H+) in water. Binary acids are acids that consist of two elements, one of the elements hydrogen-containing compounds. As the pure compound (ie - in the gaseous or liquid state), they have different properties than they do in aqueous solution of the compound. The rules for naming the acid as the pure compound is different for naming the acid in aqueous solution.

Rules for naming binary acids:

  1. As the pure compound (ie - in the gaseous or liquid state),
    • start with 'hydrogen'
    • follow by the anion name ending in '-ide'.
  2. As aqueous acid solutions,
    • start with 'hydro-'.
    • change the anion name to end with '-ic'.
    • add the word 'acid' at the end.

Example

Name of the Pure Compound Name of the Acid in Aqueous solution
HBr hydrogen bromide hydrobromic acid
HF hydrogen fluoride hydrofluoric acid
H2S hydrogen sulfide hydrosulfuric acid


Content suitability

BCIT courses: CHEM 0011