The Effect of Copper Patina on Copper’s Resistance
This experiment was conducted to test the effect that copper patina has on a copper rod. This experiment’s data proved that a coating of copper patina does affect the resistance of the piece, but positively. The experiment included placing each individually cut copper piece of heated Copper Sulfate and Ammonium Chloride solution while one remained uncoated, which was the (-). One set with a coating had double the amount of patina present on the copper piece than the other, and was designated as the (+), while the minimal patina sample set was the standard. After all coatings were completed, a current was applied by connecting the copper piece to a DC power supply and an amp meter and a volt meter. The resistance of each piece was determined by calculating the ohms of each piece from the volts and amps measured.
The experiment was analyzed statistically using an ANOVA test. After collection of data, the null hypothesis was rejected with the P-value of 3.113 x 10-15. This concludes that there was some effect created by the patina when applied to a copper piece. Upon further exploration, the data illustrates that the amount of patina present was inversely related to the resistance of the copper.
Research Done By:
Daniel Shing
Cousino High School
Warren Consolidated Schools