Thursday, May 20, 2010

Single Displacement, Oxidation Reduction Reaction Lab

Statement of the Problem:
How many grams of copper will be produced from an oxidation reduction reaction when you know the mass of Aluminum that reacted with a known amount of copper(II) sulfate pentahydrate? And how will this compare to the actual yield of copper?
We knew from the beginning of the lab that a single displacement reaction would occur between the copper and aluminum ions in the solution. The true purpose of this lab was to observe a chemical reaction in which a percent yield equation could actually be used.

Hypothesis:

We hypothesis that a single displacement reaction will occur in the copper(II) sulfate pentahydrate and aluminum solution between the copper in CuSO4-5H2O and the aluminum powder.

Materials:
  • 100 mL Beaker
  • Asbestos Pad
  • Bunsen Burner
  • Glass Stirring-Rod
  • 15 g Copper(II) Sulfate Pentahydrate
  • 0.8 g Aluminum Powder
  • Filter paper
  • Water (H2O)
  • Safety Goggles
  • Chemical Aprons
  • Iron Ring
Safety Concern:
Since we are working with harmful chemicals during this lab, you are required to wear protective eye glasses and a chemical apron at all times. But the safety is not limited to protective clothing. We will be working with an open flame and should be aware of our surroundings so we do not harm ourselves our others.

Procedure:
We began by filling our 100 mL beaker with 80 mL of water and positioned it on the iron ring above our bunsen burner and ignited the flame. We then measured out 15 g of Copper (II) sulfate pentahydrate and slowly added it to the heating water. After adding the Copper (II) sulfate pentahydrate, you must wait for it to fully dissolve. When it became a homozygous mixture, we measured out 0.8 g of Aluminum powder and mixed it in the solution. It was only a matter of minutes for the reaction to take place, the aluminum replaced the copper and free floating copper was left in the beaker. After the reaction took place, we poured the solution through a filter paper into an erlanmyer flask, separating the copper from the rest of the solution. Once the copper was separate, we weighed our product and then calculated the percent yield for our reaction.

Results:
Single displacement reaction occurred in the copper(II) sulfate pentahydrate and aluminum solution between the copper and aluminum powder.

Conclusion:
Our conclusion resulted in the single displacement reaction that occurred in the solution.