1. Ionic Compounds with Transition Metals
Chemistry Part 7
Ionic Compounds with Transition Metals

2. 1+ 3+ 3- 2- 1- 2+
Charges of transition metals will be given in the periodic table as their formation is complicated.

3. Remember: Ionic Compound: Binary Ionic Compound:
A compound made up of oppositely charged ions held together by ionic bonds.
Binary Ionic Compound:
A compound composed of ions of one metal element and ions of one non-metal element.

4. Transition Metal Ions In the centre of the periodic table
Groups 3 – 12.
Most are able to form more than one cation.
Examples:
Copper can form the cations Cu1+ and Cu2+
Iron can be Fe2+ or Fe3+

5. Transition Metal Ions
Use roman numerals to determine the positive charge for the ion.
See the back of your periodic table.
1  I
2  II
3  III
4  IV
5  V
6  VI

6. Formula Writing
Same process for binary ionic compounds, but use the roman numeral to tell you the charge of the cation.
Determine the charge of each atom.
Draw circles to represent each element until their charges cancel out.
Write the symbol of each atom, starting with the metal.
Add subscripts to show the number of atoms present (the number of circles).

7. Formula Writing Example: Copper (I) chloride Cu  1+ Cl  1- CuCl 1+

8. Formula Writing Example: Iron (II) chloride Fe  2+ Cl  1- FeCl2 1+

9. Formula Writing
Example:
Osmium (II) Sulfide
Os  2+
S  2-
OsS 2+ 2-

10. Formula Writing
Example:
Nickel (III) fluoride
Ni3+ and F1-
NiF3

11. Nomenclature
Follow the rules set in place by IUPAC.

12. Nomenclature Make a table with circles for each ion.
Work backwards to determine the charge of the transition metal.
Write the name of cation (the transition metal)
Write the charge of the cation in roman numerals in brackets.
Write the name of the anion with the “ide” ending.

13. Nomenclature Example: Fe2O3 Iron II or III? 2-
Iron must have a 3+ charge
Iron (III) oxide 2- 2- 2-

14. Nomenclature Example: NiF3 Nickel II or III? 1-
Nickel must have a 3+ charge
Nickel (III) fluoride 1- 1- 1-

15. Nomenclature Example: PbO2 Lead II or IV? 2-
Lead must have a 4+ charge
Lead (IV) oxide 2- 2-

16. Nomenclature
Example:
ZnS
Zinc only has a 2+ charge
Zinc sulfide

17. Nomenclature
Note:
We never use roman numerals for metals with only one charge.
Look at your periodic table: this includes all metals and some transition metals.
Scandium, Zinc, Silver, etc.
Do NOT use Roman numerals for these metals!

18. Practice
Worksheet
Page 127 # 7, 8, 10, 14