Hydration

Water of Hydration Lab

Mr. Scott

Chemistry (H)

Joe

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