1 Binary/Ternary Acid Nomenclature Binary Acids are acids made of two components. – Hydrogen and, – A single nonmetal (F, S, Cl, Se, Br, and I) Ternary Acids are acids made of two components. – Hydrogen and, – A polyatomic ion Acids act as molecular and ionic compounds. When dissolved in water, acids ionize or, in some cases, dissociate.

2 Binary Acid Formulae Formula Structure – Elements present (always starts with hydrogen) – Subscripts * (shows how much of each element) HCl * If no subscript is present it means that there is only one atom of that element This is a molecule of a molecular compound. This is hydrochloric acid.

3 hydrochlorinehydrochloric Binary Acid Nomenclature Naming those featuring a single nonmetal… – Write “hydro” immediately followed by the second element, the nonmetal. – Change the ending of the second element to - ic. Had this been a normal molecular formulae the ending would have been –ide… It maybe helpful to think “Change –ide to –ic.” – Write the word “acid” Example: HCl becomes hydrochloric acid

4 Ternary Acid Formulae Formula Structure – Elements present (always starts with hydrogen) – Subscripts * (shows how much of each element) HNO 2 * If no subscript is present it means that there is only one atom of that element This is a molecule of a molecular compound. This is nitrous acid.

5 Naming those featuring a polyatomic ion… – Write the name of the polyatomic ion. – Change the ending of the polyatomic ion… -ate turns to -ic.“Change –ate to –ic.” -ite turns to –ous. “Change –ite to –ous.” – Write the word “acid” Example: HNO 2 becomes nitrous acidnitritenitrous Binary Acid Nomenclature

6 HI hydroiodic acid H 3 PO 4 phosphoric acid H 3 BO 3 boric acid H 2 S hydrosulfuric acid HF hydrofluoric acid H 2 SO 4 sulfuric acid HNO 3 nitric acid HBr hydrobromic acid HClO 3 chloric acid H 3 PO 4 phosphoric acid HCl hydrochloric acid Cl - NO 3 - SO 4 2- F - S 2- BO 3 3- PO 4 3- I - ClO 3 - Br - HPO 4 2- Binary Acid Formulae H+H+