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

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

Objectives

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

Iron (III) Oxide

Sodium Carbonate

Nitrogen Trichloride

CuSO3

LiC2H3O2

Magnesium Sulfite

Ba3(PO4)2

Hydrochloric Acid

CaBr2

Aluminum Hydroxide

HNO3

CuI

Ammonium Phosphate

I2Cl2

Lead (II) Acetate

Section 4.2

Naming and Writing Formulas for More Complex Compounds

C. Writing Formulas from Names

• Sodium hydroxide• Carbon monoxide• Potassium carbonate• Barium phosphate • Gold (I) oxide• Sulfuric acid • Dinitrogen pentoxide• Aluminum iodide • Cobalt(III) nitrate• Hydrochloric acid