1. BR 1/17
A hydrate is a compound with water added. When naming them we use the prefixes we used for covalent compounds. For example:
CuSO4 · 5H2O is copper II sulfate pentahydrate
1. Now name the following hydrate:
CaCO3 · 7H2O
To find the mass of the hydrate we just add the mass of 7 water molecules to the mass of the salt. Remember a salt is an ionic compound.
2. Find the percent composition of water in the hydrate.

2. Review over empirical and molecular formulas: Have your notes out for me to check stamp #3
Determine the molecular formula for the following if the mass of the molecular formula is 34 g/mole. Oxygen is 94.1% and hydrogen is the rest. For this problem you will have to find the empirical formula first, then the molecular.