1. Writing Formulae and Naming
Chapter 19 Section 3b

2. Hydrates Hydrates are compounds that have water added into the formula
The water is part of the compound, not dissolving it
Naming:
A prefix indicating the number of water molecules and –hydrate is added to the name

3. Hydrate example Copper (II) sulfate exists as a hydrate:
Name: copper (II) sulfate pentahydrate
Write formula:

4. Naming Binary Covalent Compounds
Name of a covalent compound indicates the number of atoms
Name first element
If there is more than one atom, use prefix to indicate the number
Use a prefix for the second element, then the root name, then the suffix -ide

5. Binary Compound Examples
N2O NO
NO2
N2O5
You can find a list of prefixes on page 593!