Warm-ups: Crystals need water in the
structure to be crystals. With the water
these are called "hydrates". For example
Copper (II) Sulfate pentahydrate
(CuSO4*5H2O.) The salt without water
is said to be "anhydrous".
Objectives: Predict mass "lost" by
a hydrate
Announcements: Stoichiometry Rules!
Prelab: What will be the mass of anhydrous
Copper (II) Sulfate when dehydrated? Start
with between 1 and 2 grams. Weigh* it out
exactly. In a crucible heat strongly for 8 min.
with the lid on. Do your predictions, show it
to me. When, when cool, get the new mass*.
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