Hydration
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Water of Hydration Lab
Mr. Scott
Chemistry (H)
2/26/08
Purpose:
The purpose of this experiment is to determine that all the water has been driven from the magnesium sulfate hydrate and the cupric sulfate hydrate by heating a sample to constant mass.
Procedure:
First, we place the crucible and cover on the clay triangle and heat it, leaving a small opening for any gases to escape. Next, we transfer the crucible and cover to a wire gauze and let them cool for five minutes. When cooled, we determined the mass of the empty crucible and cover and recorded the data. Then, we added the five grams of magnesium sulfate and heated it for five minutes. We heated once more to make sure that there is a constant mass. After heating, we let it cool and then recorded the mass of the crucible, cover, and magnesium sulfate. When we finished with the magnesium sulfate, we repeated the experiment only this time using the cupric sulfate.
Data:
Magnesium Sulfate
Cupric Sulfate
Empty crucible and cover
33.81
Empty crucible and cover
33.79
Mass of crucible, cover and magnesium sulfate
38.80
Mass of crucible, cover and cupric sulfate
38.80
Mass of crucible, cover and anhydrous magnesium sulfate after first heating
36.26
Mass of crucible, cover and anhydrous cupric sulfate after first heating
36.94
Mass of crucible, cover and anhydrous magnesium sulfate after second heating
36.26
Mass of crucible, cover and anhydrous cupric sulfate after second heating
36.93
Summary:
After going through the experiment, we are able to find out how many moles of water were driven away from the cupric sulfate and the magnesium sulfate. It was able to tell us how accurate we were to the correct results.
Conclusion:
When we calculated our results, we found that we were pretty accurate with the correct results. We came up with about seven moles of water for the magnesium sulfate and about five moles of water for the cupric sulfate. We