Hydrated Crystals Lab

Topics: Magnesium sulfate, Mass, Laboratory equipment Pages: 2 (272 words) Published: October 10, 2013


Hydrated Crystals LAB

PURPOSE:

The purpose of this lab was to determine the percent of water in the given hydrate.

MATERIAL/EQUIPMENT LIST:

Crucible and cover
Clay Triangle
Crucible Tongs

PROCEDURE:
1. First, the crucible and crucible cover were cleaned and dried. 2. The crucible and crucible cover were then placed on the clay triangle and heated with the Bunsen Burner for 3 minutes. 3. After this, the crucible and crucible cover were allowed to cool and were massed. 4. After getting the mass of the empty crucible and crucible cover, 3 grams of magnesium sulfate crystals were added to the COOL crucible. 5. The crucible, cover and hydrated salt were then massed all together. 6. After this, the crucible (containing the hydrated salt) and crucible cover (slightly askew) were placed on the clay triangle and heated with the Bunsen Burner for 3 minutes. 7. The crucible and crucible cover were carefully removed from the clay triangle and allowed to cool. 8. After being cool enough, the crucible, crucible cover, and the contents were massed. 9. Steps 5-8 were repeated for more accurate results.

10. The data was recorded and equipment was put away.

DATA AND OBSERVATION:

- Mass(empty crucible and crucible cover) : 31.75 grams
- Mass(crucible with contents and crucible cover) : 34.75 grams - Mass(crucible with contents and crucible cover AFTER 1st heat) : 33.72 grams Mass(crucible with contents and crucible cover AFTER 2nd heat) : 33.26

ANALYSIS:

CONCLUSION:

The purpose of this experiment was to determine the percent of water in the magnesium sulfate crystals (hydrated) by comparing the mass of the hydrated crystal with the mass of the anhydrous crystal. In doing so, we determined that the results were not as accurate as expected.
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