7.
Naming Binary Acids
 Acids are compounds that when dissolved in water release hydrogen ions
(H+).
 Hydrogen is usually the first element in the chemical formula of an acid.
 Hydrogen can combine with other single elements (binary acids) or they
can combine with polyatomic ions (oxy-acids).
It is important to remember that these hydrogen compounds are not acids
until they dissolve in water.
Example:
Compound (gas)
solution (water)
→
→
HCl
HCl (aq)
→
→
hydrogen chloride
hydrochloric acid
8. Naming Oxy-acids (polyatomic ions containing acids)
Oxy-acids are named with a variation of the name of the polyatomic ion in the
formula. The formula comes from crossing the charges of hydrogen with the oxyanion. Eg. H1+ PO43- → H3PO4
All acids with “-ate” endings are called “-ic” acids.
ex:
HNO3 (aq)
nitric acid
H2SO4 (aq)
sulphuric acid
Try these:
HI (aq)
hydrosulphuric acid
HF (aq)
hydrobromic acid
HClO3 (aq)
phosphoric acid
H2CO3 (aq)
Iodic acid