We determined the number of grams of copper that was produced from oxidation reduction after we found the mass of Aluminum that reacted with our known amount of copper II sulfate (.31) pentahydrate and compared those to the actual yield of copper.
we obtained a measured sample of aluminum compound and a measured amount of copper sulfate pentahydrate. Then we reacted the two in an aqueous medium within a medium sized beaker; stirring it frequently.After that process we filtered ,dried, and weighed the resulting product.
Procedure:
we obtained a medium sized beaker (250 to 400mL.)Then we added 150 to 200 mL of water to the beaker, then we began heating over a Bunsen burner.
boiled
100 mL H2O ------> 60 mL
Then we measured out about 15g of Copper (II) sulfate pentahydrate (CuSO4 x 5 H2O) and weighed out the mass of each, then slowly added the crystals to the heating water.
If you let it heat to fast with the substance in there it may blow up! be careful not to heat it to fast. Here is an example of what it will look like if this happens:
We then stirred the solution until the Copper (II) sulfate pentahydrate dissolved. While this was happening one of us went and got an aluminum substance that weighed .424 grams.
We then carefully added alumium to the hot solution with continuous stirring until all is placed into the beaker.Stirring frequently allow the reaction to occur. Once we couldnt see anymore aluminum,we heated an additional 3 to 4
minutes, then removed the beaker from the heat.We used the coffee filter and funnel to filter the residue in the beaker, catching the filtrate into the Erlenmeyer
flask provided.
Afterewards we removed the filter paper from the funnel and spread it out on a paper towel to dry overnight. The next day we weighed the filter paper and dried residue.
analysis:
filter paper: 1.5g
copper (II) Sulfate: 10g
Aluminum: .424g
Yielded Copper: .31g
Blende bioled H2O evaporated: 40 mL
.424g Al+ 10g CuSo4 x 5H20 ----> .31 Cu+ AlSo4
