1. Chemical reactions
QOD:
Guess how you would write the symbols for the following:
potassium chloride
carbon monoxide
Hint: sodium chloride =
NaCl

2. How do we name compounds?

3. Classifying Compounds
Is there a metal or a polyatomic ion present?
If the answer is yes, use the system for naming ionic compounds.
If the answer is no, use the system for naming covalent compounds.

4. Ionic compounds Ex: NaCl  Ex: H3OCl
#5.1 Aim: How do we name compounds?
Agenda
QOD (5)
Lesson:
Naming compounds (15)
Activity: translating (15)
Closing (5)
HW #44
Ionic compounds
positive ion + negative ion – “ide”
Ex: NaCl 
“sodium chloride”
Same rules for polyatomic ions (use Table E)
Ex: H3OCl
“hydronium chloride”
How would you write MgF2?
What is the symbol for sulfur cyanide?

5. Naming Ionic Compounds: Examples
Na2SO4
sodium sulfate
C2H3O21-
acetate
CO32-
carbonate
HCO31-
bicarbonate
NH41+
ammonium
NO31-
nitrate
OH1-
hydroxide
PO43-
phosphate
SO42-
sulfate
* Groups I & II, Al, Zn, Cd, and Ag need no Roman numeral.
Fe(NO3)2
iron (II) nitrate
AlCl3
aluminum chloride
PbI4
lead (IV) iodide
(NH4)3PO4
ammonium phosphate
Mg3N2
magnesium nitride
AgC2H3O2
silver acetate

6. CaCl2
K2CrO4
B2Si
FeN
Li3N
CF4
Na2O
NH4Cl

7. SOCCR (symbol, oxidation, criss-cross, reduce)
Writing Formulas
SOCCR (symbol, oxidation, criss-cross, reduce)
Mg+2Br-1
MgBr2
This is just a ratio, so you can’t have a negative number of atoms. Ones aren’t written.
CaO (the two’s reduce to one!)
Ca+2O-2

8. strontium nitrate
 lithium sulfate
hydrogen gas
sodium peroxide
potassium phosphate
potassium chromate
calcium oxide
cesium bromide

9. Naming Ionic Compounds
There are, however, a complicating factor:
I. Some metals form more than one ion. (multivalent)
I. Metals that form more than one ion, such as iron, add a Roman numeral to the name to indicate the charge:
Fe2+ is called iron (II) and Fe3+ is called iron (III)
Assume a Roman numeral is required for any metal except
1. metals in groups IA and IIA on the periodic table
2. aluminum, cadmium, silver, and zinc

10. Naming Ionic Compounds (continued)
If a Roman numeral is required, the charge on the metal ion must be determined from the charge on the negative ion.
Helpful Rules to Remember
A metal ion is always positive.
The Roman numeral indicates the charge, not the subscript.
The positive and negative charges must cancel (total charge must = 0).
Nonmetals are always negative & can never form more than one monatomic ion.
Examples
Formula
Reasoning
Name
FeCl2
Cl has a 1- charge, and there are 2 of them for a total of 2-, so the Fe must be 2+
iron (II) chloride
Fe2O3
O has a 2- charge, and there are 3 of them for a total of 6-, so the Fe must have a total charge of 6+ split equally between the two iron atoms, so each must have a 3+ charge
iron (III) oxide
PbS2
S has a 2- charge, and there are 2 of them for a total of 4-, so the Pb must be 4+
lead (IV) sulfide
Cu3N
N has a 3- charge, so the Cu must have a total charge of 3+ split equally between the 3 copper atoms, so each must have a 1+ charge
copper (I) nitride

11. Silver (III) Nitride ____________________________
Vanadium (III) Chloride __________________________
Lead (IV) oxide ____________________________
Pb Br4__________________________
Pb3 N2__________________________
Cu2 S___________________________

12. The tricky thing about ionic compounds
#5.1 Aim: How do we name compounds?
Agenda
QOD (5)
Lesson:
Naming compounds (15)
Activity: translating (15)
Closing (5)
HW #44
The tricky thing about ionic compounds
How do we know how many atoms there are since there are no prefixes?
Ex: calcium bromide  CaBr??
Use the charge! (make it equal zero)
What is the symbol for magnesium iodide?

13. Molecules For compounds with _______________ bonds: Ex: CO 
#5.1 Aim: How do we name compounds?
Agenda
QOD (5)
Lesson:
Naming compounds (15)
Activity: translating (15)
Closing (5)
HW #44
Molecules
For compounds with _______________ bonds:
Prefix— lower electronegativity atom +
prefix— higher electronegativity atom – “ide”
Ex: CO 
carbon monoxide
How would you write CO2?
What is the symbol for dioxygen diflouride?

14. Can you translate these…?
#5.1 Aim: How do we name compounds?
Agenda
QOD (5)
Lesson:
Naming compounds (15)
Activity: translating (15)
Closing (5)
HW #44
Can you translate these…?
1. Sulfur trioxide
3. hydronium chloride
2. N2Cl2
4. Magnesium bromide

15. Naming compounds practice

16. Closing
How do we name this compound?
LiNO3