Ternary Acid
Definition and meaning of Ternary Acid in chemistry.
A ternary acid is an acid that contains three different elements: hydrogen, oxygen, and another nonmetal element acting as the central atom. These compounds are also commonly referred to as oxoacids or oxyacids because their molecular structure consists of acidic hydrogen atoms bonded to a polyatomic ion containing oxygen.
In more detail
In aqueous solutions, ternary acids ionize to release hydrogen ions (H+), which directly imparts their characteristic acidic properties to the solution. The chemical strength of the acid typically depends heavily on the electronegativity of the central nonmetal atom and the total number of oxygen atoms present in the molecule. More oxygen atoms draw electron density away from the hydrogen-oxygen bond through inductive effects, thereby making it significantly easier for the hydrogen ion to dissociate into the surrounding water. These acids follow specific chemical nomenclature rules based entirely on the name of the polyatomic anion they contain. If the corresponding polyatomic ion name ends in the suffix "ate", the resulting acid name ends in "ic"; conversely, if the ion ends in "ite", the acid ends in "ous".
Key facts
| Field | General Chemistry |
|---|---|
| General formula | H-O-X, where X is a central nonmetal |
| Alternative name | Oxoacid or oxyacid |
Sulfuric acid, with the chemical formula H2SO4, is a common and industrially important ternary acid consisting of hydrogen, sulfur, and oxygen atoms.
Frequently asked questions
How are ternary acids named?
If the polyatomic ion ends in 'ate', the acid ends in 'ic'. If the ion ends in 'ite', the acid ends in 'ous'.
What is the primary difference between a binary and ternary acid?
Binary acids contain only two elements, hydrogen and a nonmetal, while ternary acids contain hydrogen, oxygen, and a third element.