Section 4.2
Naming and Writing Formulas for More Complex
Compounds
C-5-1 5th Platoon
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
An example of an Army organization:
(1) The squad is the smallest unit, consisting of 8 to 10 Soldiers. The squad leader is an NCO.
(2) The platoon includes the platoon leader (2LT/1LT), platoon sergeant (SFC), and two or more
squads.
(3) The company includes the company commander (CPT), first sergeant (1 SG) a headquarters,
and two or more platoons.
(4) The battalion includes the battalion commander (LTC), his staff and headquarters, the
command sergeant major (CSM) and approximately 3-5 companies.
(5) The brigade includes the brigade commander (COL), command sergeant major, a
headquarters, and approximately 3-6 battalions.
(6) The division structure is the capstone element of our Army. It includes three maneuver (armor
or infantry) brigades as well as several combat support and service support brigades or battalions.
There are currently 10 active divisions, each commanded by a major general (two-stars).
(7) Organizations higher than the division include the Corps, Army, Major Command (MACOM),
and in times of war, the Theater.
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
Objectives
1. To learn the names of common polyatomic ions
2. To learn to name compounds containing polyatomic
ions
3. To learn how the anion composition determines an
acid’s name
4. To learn names for common acids
5. To learn to write the formula for a compound, given its
name
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
A. Naming Compounds That Contain Polyatomic Ions
• Polyatomic ions are charged entities composed of
several atoms bound together (“charged molecules”).
• Compounds should be electrically neutral
• Use parentheses (when appropriate) in writing formulas
e.g Ni(CN)2
• They have special names which should be memorized.
• They should be considered as other ions in determining
names of compounds
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
Copy out
the “Top
Ten” and
learn them
for a quiz
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
A. Naming Compounds That Contain Polyatomic Ions
• Naming ionic compounds containing polyatomic ions
follows rules similar to those for binary compounds.
– ammonium acetate
Rules D
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
Naming Compounds That Contain Polyatomic Ions
Name the following compounds (are they Type I or II metals?):
 NaOH
 Na2CO3
 CuOH
 Cu(OH)2
 Cu2SO4
 Zn(NO3)2
 Fe3(PO4)2
 NaC2H3O2
 (NH4)2CO3
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
B. Naming Acids
• An acid is a molecule with one or more H+ ions attached
to an anion. When dissolved in water the H+ ion and
anion separate.
Rules E
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
B. Naming Acids
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
B. Naming Acids
Rules F
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
B. Naming Acids
Acids of
Oxyanions
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
B. Naming Acids
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
Name, and give the formula for, the acids made from the
following anions:
 Chloride
 Nitrate
 Bromide
 Cyanide
 Acetate
 Sulfite
 Sulfate
 Fluoride
 Phosphate
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
Binary Ionic
Polyatomic Ionic
Acids Molecular
Ammonium
Phosphate
LiC2H3O2
Nitrogen
Trichloride
Iron (III) Oxide
CuI
CuSO3
Sodium
Carbonate
Lead (II) Acetate
Magnesium
Sulfite
CaBr2
I2Cl2
HNO3
Hydrochloric Acid
Aluminum
Hydroxide
Ba3(PO4)2
Section 4.2
Naming and Writing Formulas for More Complex
Compounds
C. Writing Formulas from Names
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Sodium hydroxide
Carbon monoxide
Potassium carbonate
Barium phosphate
Gold (I) oxide
Sulfuric acid
Dinitrogen pentoxide
Aluminum iodide
Cobalt(III) nitrate
Hydrochloric acid