Step 1: Gather Materials
Step 2: Copper Acetate(WSDTY). First, both beakers will be filled with about 27 grams of pennies. In each beaker, the pennies were separated such that one beaker was filled with pennies made previously to 1983, and one with pennies made after 1984. These beakers were filled with equal parts Distilled Vinegar, and 3% Hydrogen Peroxide. What you will see is the evolution of Oxygen gas as the reaction proceeds. These two solutions were allowed to react overnight and then the insoluble impurities filtered off, using a coffee filter.
Step 3: Recording Data, Explanation, and the Science! The solution made with more copper is a much deeper blue, indicating there is a much higher content of Copper Acetate. There was a recorded loss of 1.23g in the pre-1983, and 1.95g in post 1984. The mass lost is greater in the newer pennies, why The best explanation I can come up with is that the Copper was oxidized more so in the newer pennies. Copper Oxide is insoluble in water, and thus is left behind during the filtration step. As you can see here the black copper oxide is removed with a little bit of force, proving that the majority of the copper was oxidized, rather than forming copper acetate. H2O2 + CH3CO2H CH3CO3H + H2O Reduction of Copper metal by Hydrogen Peroxide, and the synthesis of Copper Acetate 2Cu + 4CH3COOH + 2H2O2 → [Cu2(H2O)2(CH3COO)4] + 2H2O
Step 4: Which Method Do I Use As for the two methods used, the Copper Sulfate method. produces more pure copper acetate, as well as in higher quantities in a cheaper method. This is a fun way to create Copper acetate though, and would only be cheaper if you had the scrap copper for free.
Click Cuprous Chloride to learn about more information