First, we heated the crucible for 5 minutes to make sure it was dry and there was no moisture contained in it. Then we took some hydrate and put it in the crucible and weighed it, and recorded it.
We heated the hydrate for 5 minutes and recorded our observations. The hydrate became bluish white in colour. After 5 minutes we weighed it again and found that it had gotten lighter because all of the water it contained was gone. It was now a anhydrous salt.
A hydrate is a water containing compound.
Copper (II) Sulfate PentahydrateCuSO4 * 5H2O
An anhydrous salt is a salt that has been heated up until all of the water it contains has evaporated.
We repeated the experiment twice and found that both times the mass was the same
After we added a couple of drops of water and a reaction took place.
The salt turned blue and gas was released
We learned that this water caused the salt to turn back into a hydrate.
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