Naming Acids

Naming Acids Acids are ionic (meaning they have a charge!) compounds that always start with a hydrogen ion. (H+) Always start by identifying if the acid contains oxygen.

Naming Acids with NO Oxygen The cation is always H+ so the name will always start with Hydro- The anion is the root of the element with the ending –ic Always have to include “Acid” at the end.

Examples HF HBr

Naming Acids that HAVE Oxygen (Means it’s polyatomic) The cation is always H+, so we don’t have to name it. The anion is the root of the polyatomic + an ending If the polyatomic ends in –ate, change it to –ic Sulfate = Sulfic If the polyatomic ends in –ite, change it to –ous Always have to include “Acid” at the end.

Examples HNO3 H2SO4

Practice H2CO3 HI H3PO4 HCl

Writing the Formula for an Acid

Every formula will start with an H! Look for the prefix Hydro- If it contains Hydro-there is no oxygen! No oxygen=no polyatomics! Start by writing down H and its charge Write the anion with its charge Balance charges, write the formula and reduce when necessary Example: Hydrochloric Acid

Write down the H and its charge No prefix hydro? Change the ending back -ic = -ate -ous = -ite Write down the H and its charge Find the formula and the charge of the polyatomic Balance charges, write the formula and reduce when necessary.

Examples Sulfurous Acid Phosphoric Acid Chlorous Acid Carbonic Acid