#2 Chemical Lab

Introduction:

     Prior the the experimenting in the lab, we read and understood the lab procedures that were needed for a successful experiment. Thinking of what might happen to the aluminum foil , we then created a hypothesis, keeping in mind the supplies needed, and the processes that were going to take place.

Hypothesis:

    We presumed that the coper sulfate and the water would have a chemical reaction creating some sort of a temp. change. Then with the added aluminum we suggested that the aluminum would melt do to the water and coper sulfate solution. With the arrival of the salt we then made the assumption that it was going to speed up the process, acting ling some sort of food or energy for the chemical reaction.

Materials:

• A glass stirring rod
• A thermometer
• A 100ml. graduated cylinder
• A small square of aluminum foil
• Copper (II) sulfate pentahydrate
• Water

Procedures:

• First, form a lab group of two or three people. Go to your lab station after taking all appropriate safety precautions we have discussed in the safety lecture.
• Go the the appropriate source and add some water in your beaker. The exact amount is not important, although it should be between 75 and 100ml.
• Now using the scoopula, obtain some of the copper sulfate. Again the exact amount is unimportant, but your scoopula should be about one quarter filled with the solid.
• Stir with the stirring rod until all the solid has dissolved.
• Obtain the aluminum foil sample in front of you and crumple it into a loose ball. Place the aluminum ball into the copper sulfate solution, and stir gently for about 15 sec.
• Now add some salt with the same clean and dry scoopula.
• Stir until all the salt is dissolved.

Data:

    Observing what took place during the experiment.

• There was not an exact set amount of ingredients
• The copper sulfate did not dissolve easily, it took grate amounts of stirring
• The copper sulfate turned the water a bluish looking color.
• The temp. was consistent for most the duration of the experiment, but as we added the salt which created a chemical reaction, the temp. also rose
• There was a distinct smell when the chemical reaction took place
• There was a gaseous vapor, as well as bubbles with in the graduated cylinder.

   
Discussion/ Condlusion:

    The expermint was fun ad intresting. We came to an understanding that the salt served as a sort of energy that caused the chemilc reaction ( copper sulfate and water ).We found that our hypothesis had somewhat been right about the aluminum being mealted.