Naming Ionic Compounds with Multivalent Metals

1
Naming Ionic Compounds with Multivalent Metals
1. Write the name of the metal first.
2. Write the name of the non-metal second,
and change the ending to -ide
3. ONLY IF THE METAL HAS 2 OR MORE COMBINING
CAPACITIES, Include a roman numeral to
indicate which one it is.
1
Cu
e.g.
CuCl2
copper has 2 ions
2
Cu
which one is it?
SC9 3-1
2
Predicting Ion Charges from Formulas
To find out which copper ion it is, work out the
ions by criss-crossing in reverse.
CuCl2
Cu Cl
2
1
Check the combining capacity of the non-metal to
make sure that it is correct.
2
1
Cu
Cl
Therefore it is copper (II) chloride
SC9 3-2
3
More Examples
FeO
FeS2
Fe O
Fe S
1
1
2
1
1
1
2
1
Fe
O
Fe
S
Check
Check
FeO Iron (II) oxide
FeS2 Iron (IV) sulphide
SC9 3-3
4
Practice
Name each of the following compounds
a) CuO
Copper (II) oxide
Combining Capacities O 2 As 3 Br 1 Cl 1
b) FeAs
Iron (III) arsenide
c) CrBr3
Chromium (III) bromide
d) Cu2O
Copper (I) oxide
e) FeCl3
Iron (III) chloride
f) CrCl2
Chromium (II) chloride
SC9 3-4