Nitrogen dioxide
Carbon monoxide
Chapter 9
Naming ACIDS
Magnesium sulphate
Naming Acids
An ACID is a substance that when put into water,
gives away a hydrogen ion (H+1) to another
substance in the water solution.
HCl + H2O
HCl(aq)
There are two types of acids:
1. Binary acids-HCl(aq)
2. Ternary acids-H2SO4(aq)
-polyatomic ions (ending in ate)
-polyatomic ions (ending in ite)
Naming Binary Acids
EX: HCl(aq)
1. Use the prefix hydro for hydrogen
2. Anion ending changes from ide to ic
3. Add the word acid at the end.
hydrochloric acid
Naming Ternary Acids
Polyatomic ions ending in ate
EX: H2SO4
1. NO hydro prefix!!!
2. Anion ending changes from ATE to IC
-Sulfate change to Sulfuric
“IC I ATE that”
3. Add the word acid at the end
Sulfuric acid
Naming Ternary Acids
Polyatomic ions ending in ite
EX: H2SO3
1. NO hydro prefix!!!
2. Anion ending changes from ITE to OUS
-Sulfite change to Sulfurous
“RITEOUS”
3. Add the word acid at the end
Sulfurous acid
Practice Naming Acids
1. H3PO4
-PO4 = phosphate
-Use saying “IC I ATE that”
Answer= Phosphoric acid
2. HNO2
-NO2 = nitrite
-Use saying “RITEOUS”
Answer= Nitrous acid
Writing Acids
How to Write a Formula for an Acid:
BINARY ACIDS
Ex: hydrosulfuric acid
1. Write down symbols
(H and S)
2. Determine Charges
(H+1
S-2)
3. Cancel charges or use criss-cross method
to form subscripts to cancel out charges
4. H2S
Ternary ACIDS
Ex: sulfuric acid
1. No hydro prefix so we have a polyatomic ion:
In this case “IC I ATE that”
sulfuric = sulfate (SO4)-2
Can also be
“RITEOUS”
sulfurous = sulfite
2. Write down symbols (H and SO4)
3. Determine Charges
(H+1
SO4 -2)
4. Cancel charges or use criss-cross method
to form subscripts to cancel out charges
5. H2SO4