1. Ionic Compounds: Naming

2. Naming Binary Ionic Compounds
always name metal [(+) cation] first
2. write stem of non-metal [(-) anion]
3. add ending “ide” to non-metal

3. stems of nonmetals element stem nitrogen nitr phosphorus phosph
arsenic
arsen
selenium
selen
oxygen ox
bromine
brom
iodine
iod
flourine
fluor
chlorine
chlor

4. The First Step in Naming
find metal on PT
if metal has only one oxidation state it’s easy
if metal has more than one oxidation state, there’s an extra step

5. metals with one oxidation state (name metal, stem non-metal, add “ide”)
CaO
BaS
AlN
LiCl
Al2Se3
Na2O
K3N
MgF2
calcium oxide
barium sulfide
aluminum nitride
lithium chloride
aluminum selenide
sodium oxide
potassium nitride
magnesium fluoride

6. what if the metal has more than one possible oxidation state?
must use roman numeral to indicate the oxidation number of the metal:
I = VI = 6
II = VII = 7
III = VIII = 8
IV = IX = 9
V = X = 10

7. metals with more than 1 oxidation state
figure out which oxidation # for metal ion
Ex: Fe can be Fe+2 or Fe+3
FeO and Fe2O3
two different compounds
cannot name both iron oxide
every formula has 1 name only

8. FeO and Fe2O3 FeO 1 O is -2 so Fe must be +2 name: iron (II) oxide
compounds are electrically neutral
charge non-metal helps decide metal charge
oxygen is -2
1 O is -2
FeO
so Fe must be +2
name: iron (II) oxide
(roman numeral II represents +2 charge on Fe)

9. FeO and Fe2O3 Fe2O3 compounds are electrically neutral oxygen is -2
each Fe is +3
iron (III) oxide
each O is -2
Fe2O3
3 O’s (-2) = -6
total negative charge
total positive charge must be +6

10. Name the following TiCl3 Mn2O4 Co2O3 PdBr2 AuCl3 MoN MnO TiO
titanium (III) chloride
manganese (IV) oxide
cobalt (III) oxide
palladium (II) bromide
gold (III) chloride
molybdenum (III) nitride
manganese (II) oxide
titanium (II) oxide

11. Naming Compounds with Polyatomic Ions
polyatomic ions have names (Table E)
naming similar to binary naming
rules:
positive always written first
if (+)’ve ion is a metal, check to see how many oxidation states it has
if more than 1, need roman numeral
if (–)’ve ion is polyatomic - 2nd part of name is name of polyatomic (don’t modify ending)

12. name the following: NaOH KHCO3 LiNO3 CaSO4 Al(NO3)3 Fe(OH)2 CuSO4
CuSCN
sodium hydroxide
potassium hydrogen carbonate
lithium nitrate
calcium sulfate
aluminum nitrate
iron (II) hydroxide
copper (II) sulfate
copper (I) thiocyanate

13. Summary: Binary Ionic Compounds
compounds are electrically neutral
ionic formulas: positive metal ion goes first
if metal has more than 1 oxidation state, name has roman numeral

14. Summary: Naming Binary Ionic Compounds
STEPS:
name metal
put roman # in ( )
- only if metal has more than one ox #
name stem of non-metal + ide ending

15. Summary: Ionic Compounds With Polyatomics
compounds are electrically neutral
ionic formulas: positive metal ion goes first
if metal has more than 1 oxidation state, name has roman numeral

16. Summary: Naming Ionic Compounds With Polyatomics
STEPS:
name metal
put roman # in ( )
- only if metal has more than one ox #
name polyatomic ion
If two polyatomic ions in formula then name both polyatomics putting (+) ion first