Lab 1: Formula of a Hydrate Lab
Purpose:
To utilize mole conversions to determine the ratio between copper (II) sulfate
molecules and water of hydration.
Materials:
1 Hot Plate
1 Wire Mesh
1 Small beaker
1 Glass Stirring Rod
1 Beaker Tong
1 Spatula
Copper II Sulfate Hydrate (approx. 5g)
Procedure:
1. Mass small beaker (empty)
2. Obtain approximately 5 grams of Copper II sulfate hydrate
3. Put hydrate in beaker and find the mass.
4. Turn hot plate on medium high.
5. Place beaker and copper II sulfate hydrate on hot plate.
6. Very carefully stir hot material occasionally with glass rod.
7. Heat until blue color is gone.
8. Turn off hot plate and unplug.
9. Let beaker cool until you can handle it.
10. Mass beaker and copper II sulfate anhydrate.
11. Empty your anhydrate into the waste beaker.
12. Mass your “empty” beaker
13. Clean everything and put it away.
Data:
Mass of Empty Beaker (g)
Mass of Beaker & CuSO4 . nH2O (g)
Mass of Beaker and CuSO4 (g)
Mass of Empty Beaker (g)
Calculations: You must show all work for complete credit.
Determine the mass of Copper II Sulfate Hydrate.
Using the mass of the beaker only and the mass of the beaker with copper II
hydrate, determine the mass of the blue copper II sulfate hydrate.
________________g CuSO4.XH2O
Determine the mass of Copper II Sulfate Anhydrate
Using the mass of the beaker and the mass of the beaker with copper II anhydrate,
determine the mass of the copper II sulfate anhydrate.
_________________g CuSO4
Determine the mass of water lost from Hydrate.
Using the mass of the copper II sulfate hydrate and the mass of the copper II
sulfate anhydrate, determine the mass of water lost from the hydrate.
__________________g H2O
Determine the number of moles of copper II sulfate anhydrate, CuSO4.
Using the mass of copper II sulfate anhydrate and the molar mass from the
periodic table, determine the number of moles of copper II sulfate used in your
experiment.
__________________ mol CuSO4
Determine the number of moles of water.
Using the mass of water lost and the molar mass from the periodic table,
determine the number of moles of water of hydration.
__________________ mol H2O
Determine the mole ratio of Copper II Sulfate and Water.
Using the number of moles of copper II sulfate and moles of water,
determine the smallest whole number ratio.
Ratio _____to _____
Write the formula of Copper II Sulfate Hydrate
CuSO4 . _____ H2O