1. Acidic Compounds Nomenclature
Binary and Oxy Acids

2. Acids Hydrofluoric Acid – HF Carbonic Acid – H2(CO3)
Nitrous Acid – H(NO3) Hydrosulfuric Acid – H2S
Bromic Acid – H(BrO3) Chlorous Acid – H(ClO2)

3. Two different types of Acids:
Binary Acids:
Acids that do NOT have oxygen
ONLY 2 elements (typically) – there are a couple exceptions (Hydrocyanic Acid)
Examples: H2S HCl HCN
Oxyacids:
Acids that DO have oxygen
These have a polyatomic ion
Examples:
H2SO4 H3PO4 HNO3

4. Naming Binary Acids: Recall: Binary acids are acids without oxygen.
Rules for writing the names of Binary Acids:
Always use hydro- as a prefix (what is a prefix)
Name the element, or non oxygen containing polyatomic ion
Change the ending to –ic
ALWAYS for Binary Acids
Add acid for the second part of the name
Example: HCl
Hydrochloric Acid

5. Practice: Binary Acid Compound
What is the element or polyatomic in the compound?
What is the name of the acid? HF
HBr
H2S
H3N
HCN

6. Writing Formulas for Binary Acids
Rules to Follow:
Always use H+ (hydrogen) for the cation
What is hydrogens charge?
Determine what the anion is (the second element or polyatomic)
Remember the ending is changed to indicate that it is an acid, so just remember to imagine the correct ending to figure out the anion.
Drop and Swap
You won’t need to simplify! (Why?)
Example: Hydrophosphoric Acid
What is the anion? _________________________
What are the two ions: __________ and ___________
What is the formula: ____________________________

7. Practice: Acid Name Hydrogen Anion Symbol Acid Formula
Hydrochloric Acid
Hydrosulfuric Acid
Hydrophosphoric Acid
Hydrocyanic Acid

8. Naming Oxyacids: Recall: Acids WITH Oxygen
Determine the polyatomic in the compound
Change the ending: Beware: the original ending determines the new ending!
If it ends in –ate it becomes –ic (carbonate = carbonic acid)
“I ate it and it was ic (icky)”
If it ends in –ite it becomes –ous (sulfite = sulfurous acid)
“It’s ite (aight) with ous (us)”
Add “Acid” as the second part of the name
Examples:
H2SO4 – Sulfuric Acid H2SO3 – Sulfurous Acid

9. What is the polyatomic ion? What does the ending change to?
Practice:
Compound
What is the polyatomic ion?
What does the ending change to?
Name of the Acid
H2CO3
HNO2
HClO4
HC2H3O2
HBrO

10. Writing Oxyacid Formulas:
Determine the polyatomic ion
Change –ic to –ate (Sulfuric Acid = sulfate)
Change –ous to –ite (Nitrous Acid = nitrite)
Hydrogen (H+1) is the cation/Polyatomic is the anion
Drop and Swap the charges/numbers
Phosphoric Acid
H+1 PO4-3
H3(PO4)

11. Practice: Name of the Acid What does the ending change back to?
What is the polyatomic symbol and its charge?
Compound Formula
Nitric Acid
Chlorous Acid
Carbonic Acid
Hypobromous Acid