Classification of Copper Reactions November 14 2022 CHEM 119 642 Gabriela Orosco and Presley Griffin Classification of Copper Reactions Lab Report Introduction Copper is a very important chemical that is used in everyday life You can find it in antimicrobial products and treatments for drinking water Copper containing solutions are noted for their remarkable corrosion resistance properties and the reduction of growth in numerous bacteria In an experiment copper was put against peptide nucleic acid on I pneumophlia and found the copper numbers to be higher in inactivating the bacteria 1 The purpose of the Classification of Copper Reaction experiment is to understand and identify the reactions that occur during the copper cycle The copper cycle was witnessed in a series of reactions that lead to the final product of solid copper Summary For this experiment the chemicals that were used included 0 5M Copper II Chloride Dihydrate CuCl x 2H2O 0 5M Sodium Carbonate Na2CO3 1M Hydrochloric Acid HCl and Zinc Zn powder 10mL of CuCl2 was measured using a 10 mL graduated cylinder and then transferred to a clean 125mL Erlenmeyer flask The 10mL graduated cylinder was then rinsed with distilled water twice in order to ensure it was cleaned properly In that same 10 mL graduated cylinder 10 mL of 0 5M Na2CO3 was measured and mixed with the CuCl2 in the 125 mL Erlenmeyer Flask This mixture is swirled to allow the precipitate to form The 10 mL graduated cylinder is rinsed again with distilled water twice to ensure it is properly cleaned To set up the gravity filtration apparatus a filter paper was folded into a cone and then added to a plastic funnel in order to keep the paper in its cone like shape a few drops of distilled water was used to wet the sides The funnel is added to a 2nd Erlenmeyer flask and the mixture from the first Erlenmeyer flask was poured through the gravity filtration apparatus All liquid was completely drained through the filtration The retained solid left in the filtration apparatus was then transferred into a clean 150 mL beaker using a lab spatula making sure to carefully scrape the sides of the filtration apparatus without tearing the paper A few drops of distilled water were used to remove any solid suck to the walls of the beaker The beaker was covered with a watch glass and placed on a hot plate at 250 degrees Celsius The beaker was left on the hot plate until the precipitate changed colors After the precipitate changed colors the beaker was removed from the hot plate and Primary Author Classification of Copper Reactions November 14 2022 CHEM 119 642 Gabriela Orosco and Presley Griffin allowed to cool After the beaker was cooled the precipitate was transferred into a clean dry 125 mL Erlenmeyer flask 10 mL of 1M HCI was measured in a 10 mL graduated cylinder and added to the 125 mL Erlenmeyer flask with the precipitate in it this mixture was rapidly stirred until the precipitate is fully dissolved A clean 50 mL beaker was weighed and the mixture from the Erlenmeyer flask was transferred into the beaker with a magnetic stir bar and placed on a stir plate at medium to high speed 0 3300 g of Zinc powder was measured and added to the 50 mL beaker on the stir plate with an additional 10 mL of HCI solution The solution was stirred for 2 mins then 10 mL of HCI solution was added to the beaker and was stirred for 5 more mins The solution was continuously stirred until the liquid looked clear and all the zinc was dissolved After the reaction subsided the stirring stopped and the supernant was carefully drained from the beaker to avoid losing any copper 10 mL of distilled water is added to remove all copper from the sides of the beaker and the stir bar is extracted using a magnetic retriever The beaker is placed back on the hot plate at 250 degrees Celsius until all the water had evaporated out of the beaker and the beaker was reweighed to obtain final mass of the copper All liquids were disposed in the inorganic waste and the copper was disposed in the solids waste container Results and Observations Following this experiment the theoretical mass experimental mass and percent yield were used to calculate the given data To calculate the theoretical mass 0 5 mol L is multiplied by 0 01 L to obtain the total moles The total moles were multiplied by the moles of Cu 63 5 grams to get the theoretical mass of 0 3175 grams The experimental mass was recorded by taking the difference of the final beaker weight and the initial beaker weight which was a total of 0 6769 grams Lastly the percent yield was calculated by dividing the experimental weight by the theoretical weight then multiplying this by 100 to get a percent yield of 213 1 Example 0 6769 0 3175 x 100 Discussion and Analysis Throughout the conduction of this experiment the following observations were observed and recorded The CuCl2 started as a clear blue liquid and Na2CO3 started as a clear liquid after these solutions mixed they turned to an opaque bright blue color The precipitate slowly filtered and turned into a bright blue solid similar to the consistency to ice cream As the solid began to Primary Author Classification of Copper Reactions November 14 2022 CHEM 119 642 Gabriela Orosco and Presley Griffin heat it turned from the bright blue color to a sea form green color and then into a greyish colored liquid During this heating process bubbles were rapidly appearing As we allowed for the beaker to cool we added 10mL of HCl which turned the liquid to a clear light blue color once again Once 0 3300 grams of the Zinc powder was added the precipitate started to form chunks of black Zn appeared After the stirring stopped the reaction of Zn turning into copper was showed by bubbles appearing After adding an additional 10mL of HCl the copper appeared as a red rock like substance at the bottom of the beaker Conclusion The reactions of the copper cycle performed during the lab was concluded to be unsuccessful in producing only copper as the percent yield of this experiment was over 100 being 213 1 Though this experiment was unsuccessful the copper cycle was still shown how copper is made in nature and its importance Citations 1Marin Vincent Philippe Hartemann Marc Engels Deutsch Antimicrobial applications of copper International Journal of Hygiene and Environmental Health Volume 219 Issue 7 Part A 2016 Pages 585 591 Primary Author