1. Chapter 4.2 Naming Compounds

2. Naming Ionic Compounds
Before you name it, you have to know when you see it!
What is an Ionic Compound?
How to identify an Ionic Compound?

3. Naming Ionic Compounds
What is an Ionic Compound?
How to identify an Ionic Compound?
Metal and non-metal bonded together
Positive and negative ions
IONs and IONic compound

4. Ionic or Covalent Compound?
1. NaCl
2. CH4
3. S5Br18
4. MgO
5. NO

5. Naming Ionic Compounds (copy)
Metal ion = name stays the same
Non-metal ion = change the ending to "-ide"
Example:
NaCl = Sodium Chloride
Na = Sodium
Cl = Chlorine >>> change ending to chloride

6. Naming Ionic Compounds
Examples:
1. Li3N
2. CaO
3. ZnS
4. AlP

7. Naming Ionic Compounds
Examples:
1. Li3N = Lithium Nitride
2. CaO = Calcium Oxide
3. ZnS = Zinc Sulphide
4. AlP = Aluminum Phosphide

8. Chemical Names to Formulas
Write the chemical formula of Potassium Iodide.
Find the charge of each ion
Potassium ion = K+1
Iodine ion = I-1
The ratio is 1 to 1, so the formula is KI

9. Chemical Names to Formulas
Write the chemical formula of Potassium Oxide.
Find the charge of each ion
Potassium ion = K+1
Oxygen ion = O-2
The ratio is 1 to 2, so there must be 2 K for each O = K2O
OR cross the charges down

10. Chemical Names to Formulas
Write the chemical formula for Aluminum Nitride.
Find the charge of each ion.
Aluminum ion = Al+3
Nitrogen ion = N-3
Ratio is 3 to 3, or Al3N3     Reduce like a fraction.
AlN

11. Practice Problems Textbook Page 187 - formula to names
Page names to formula

12. Multivalent Metal Ionic Compounds
- Multi means more than one
- Valent refers to the valence electrons
So multivalent metals are metals with more than one charge.
Example: Copper, Cu (#29)
It can be Cu+1 or Cu +2 . Need to know which one!

13. Multivalent Metal Ionic Compounds
Write the chemical formula for:
1. Copper (I) fluoride
2. Copper (II) fluoride
3. Copper (II) nitride
4. Copper (II) oxide

14. Multivalent Metal Ionic Compounds
Write the chemical formula for:
1. Copper (I) fluoride = CuF
2. Copper (II) fluoride = CuF2
3. Copper (II) nitride = Cu3N2
4. Copper (II) oxide = CuO

15. Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)
in the chemical name.
Examples:
Write the chemical name of:
1. CuF
2. CuCl2
3. PbO
4. PbO2

16. Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)
in the chemical name.
Examples:
Write the chemical name of:
1. CuF = Copper (I) Fluoride
2. CuCl2 = Copper (II) Chloride
3. PbO = Lead (II) Oxide
4. PbO2 = Lead (IV) Oxide

17. Polyatomic Ions Poly = many atomic = atoms
Polyatomic Ions = ions with many different atoms. They stick together, treat them as one thing.
Look in the table for the name and formula.
Example: Sodium Nitrate = NaNO3
Sodium ion = Na+
Nitrate ion = NO3-

18. Polyatomic Ions Use brackets to show how many polyatomic ions.
Example: Zinc Hydroxide
Zinc ion = Zn+2
Hydroxide ion = OH-1
Zn(OH)2

19. Polyatomic Ions Examples Write the name of: 1. LiCH3COO 2. Mg3(PO3)2
3. CrSO4
Write the formula of:
4. Calcium Perchlorate
5. Lead (IV) Chromate
6. Ammonium Sulfite

20. Polyatomic Ions Examples Write the name of:
1. LiCH3COO = Lithium Acetate
2. Mg3(PO3)2 = Magnesium Phosphite
3. CrSO4 = Chromium (II) Sulfate
Write the formula of:
4. Calcium Perchlorate = Ca(ClO4)2
5. Lead (IV) Chromate = Pb(CrO4)2
6. Ammonium Sulfite = (NH4)2SO3

21. Polyatomic Ions
Practice Problems
Textbook
Page 193

22. Naming Covalent Compounds
Check that it IS a covalent compound first!
Two non-metals
Recall: Ionic or Covalent Compound?
1. NaCl
2. CH4
3. S5Br18
4. MgO
5. NO

23. Naming Covalent Compounds
Use a prefix to show how many of each element
First element - name stays the same. Only add a prefix if there is more than one.
Second element - change the ending to "-ide"
Example: CO2 = Carbon dioxide

24. Naming Covalent Compounds
Prefixes
1    mono
2    di
3    tri
4    tetra
5    penta
6    hexa
7    hepta
8    octa
9    nona                10   deca

25. Naming Covalent Compounds
Examples
Write the name of:
1. P2Br3
2. SO4
3. F5O10
Write the formula of:
1. dicarbon trinitride
2. hexaoxygen heptaiodide
3. octabromine monohydride

26. Naming Covalent Compounds
Write the name of:
1. P2Br3 = diphosphorous tribromide
2. SO4 = sulfur tetraoxide
3. F5O10 = pentafluorine decaoxide
Write the formula of:
1. dicarbon trinitride = C2N3
2. hexaoxygen heptaiodide = O6I7
3. octabromine monohydride = Br8H

27. Naming Covalent Compounds
Practice Problems
Textbook Pg 195

28. Diatomic Elements H2 = hydrogen N2 = nitrogen O2 = oxygen
F2 = fluorine
Cl2 = chlorine
Br2 = bromine
I2 = iodine

29. Common Mistakes Be careful:
Sulfide = S-2          Sulfate = SO4-2       Sulfite = SO3-2
Sulfur tetraoxide = SO4         Sulfur trioxide = SO3
Nitride = N-3            Nitrate = NO3-2            Nitrite = NO2-1
Nitrogen dioxide = NO2              Nitrogen trioxide = NO3

30. Naming Everything
Ionic, Covalent, Multivalent, Polyatomic will all be mixed together. You need to tell them apart to name them.
Practice Problems
Textbook Page 197, 201