How clean do coins get in each Acid or Base liquid solution? Date: 11/11/18 Time: 3:51 – 4:01 for the whole experiment it took me 20 mins. 10 mins. to set up for the demonstration experiment and 10 mins. to do the experiment. Locations of Tested Experiment: Home and the second time in the lab class, However when I demonstrated this experiment in our lab class I had only used pennies due to the amount of time it would take to do the experiment and the lab date was: 11/13/18 from 7:03p.m – 8:03 p.m. For each coin used, you will use 2-3 oz of each liquid solution from the following list. • • • • • • • Lemon Juice (Acid liquid solution) Liquid Dish Soap (Base liquid solution) Bleach (Base liquid solution) Vinegar (Acid liquid solution) Coke (Acid liquid solution) Orange Juice (Acid liquid solution) Tap Water (Neutral or my control variable) Pennies: The smells of Lemon Juice, Liquid Dish Soap, Bleach, Vinegar, and Orange Juice was present and filled the room. During this demonstration experiment, you could hear no sounds present. What I had seen and observed from this experiment was: a base and acid chemical reaction that formed effervescence this form of effervescence that took place was tiny gas bubbles that had formed on the Pennies that were in Bleach, Vinegar, Liquid Dish Soap, and Coke but not in the other solutions. Before: I started the experiment, I observed all the pennies being used and all pennies were tarnished and dirty equally. After: I took all the pennies out of the solutions I noticed that the penny in Lemon Juice was cleaned only a little bit with tarnish still present on the front side of the coin. The penny in the Liquid Dish soap was not cleaned at all and remained the same. The penny in Bleach was not cleaned at all and remained the same. However, when I took this coin out of the Bleach solution there was a white substance present on the top front of the penny due to the chemical reaction that was taking place between the coin and the Bleach. I believe this reaction was because it was being oxidized as it was giving away electrons due to the white substance left on the penny. The penny in Vinegar was cleaned completely on both sides front and back of the coin and came out looking almost new again. The penny in coke remained the same as the coke solution was starting to eat away at the penny because of the acid in the coke forming a chemical reaction and interacting with the copper in the penny. The penny in Orange Juice was not cleaned at all and remained the same. The penny in Tap Water also did not get cleaned at all and remained the same this was due to the Tap Water being neutral and my control variable. Nickels: The smells of Lemon Juice, Liquid Dish Soap, Bleach, Vinegar, and Orange Juice was present and filled the room. During this demonstration experiment, you could hear no sounds present. What I had seen and observed from this experiment was: a base and acid chemical reaction that formed effervescence this form of effervescence that took place was tiny gas bubbles that had formed on the nickels that were in Bleach, Vinegar, Liquid Dish Soap, and Coke but not in the other solutions. Before I started this experiment, I had observed: All nickels were tarnished and equally dirty. After I took all coins out of the solutions: I noticed that the nickel in the Lemon Juice was only cleaned on the front side of the coin only. The nickel in the Liquid Dish Soap most of the coin came clean but still had a little bit of dirt present on both sides of the coin. The nickel in the Bleach was not cleaned at all and a white substance was seen on top of the coin when I took it out of the solution due to the chemical reaction taking place between the coin and the Bleach. I believe this was because of the coin being oxidized giving away electrons. The nickel in the Vinegar was cleaned on both sides of the coin and looked almost new again. The nickel in coke was cleaned most of the way but not completely on both sides. The nickel in Orange Juice was cleaned only slightly on the front and back but still had a little bit of dirt present on both sides of the coin. The nickel in Tap Water was not cleaned at all and remained the same tarnished completely. Dimes: The smells of Lemon Juice, Liquid Dish Soap, Bleach, Vinegar, and Orange Juice was present and filled the room. During this demonstration experiment, you could hear no sounds present. What I had seen and observed from this experiment was: a base and acid chemical reaction that formed effervescence this form of effervescence that took place was tiny gas bubbles that had formed on the dimes that were in the following solutions of Liquid Dish Soap, Vinegar, Coke, and Tap Water. Before I started this experiment: I observed that all coins that were placed in the following solutions of Lemon Juice, Liquid Dish Soap, Bleach, Vinegar, Orange Juice, Coke, Tap Water were equally tarnished and dirty. After: I took the coins out of each solution I noticed that the dime in Lemon Juice was cleaned very little on both sides and remained dirty and tarnished. The dime in Liquid Dish Soap was not cleaned and remained dirty and tarnished as well. The dime in Bleach was not clean and remained the same. The dime in Vinegar was clean very little on both sides but remained dirty and tarnished. The dime in Coke was cleaned on the front side of the coin but not on the backside and the back side of coin remained tarnished and dirty. The dime in Orange Juice was cleaned on the back side of the coin but not on the front and remained tarnished and dirty on the front side only. The dime in Tap Water was not clean at all and remained the same tarnished and dirty. Quarters: The smells of Lemon Juice, Liquid Dish Soap, Bleach, Vinegar, and Orange Juice was present and filled the room. During this demonstration experiment, you could hear no sounds present. What I had seen and observed from this experiment was: a base and acid chemical reaction that formed effervescence this form of effervescence that took place was tiny gas bubbles that had formed on the quarters that were in the following 2 solutions Liquid Dish Soap, Bleach. Before I started the experiment: I observed that all the coins were dirty and tarnished equally the same. After: I took the Quarters out of each solution I noticed that the Quarter in the Lemon Juice was not cleaned and still dirty on the back side only. The quarter in the Liquid Dish Soap was not cleaned at all and still had remained dirty on both sides. The quarter in the Bleach was not cleaned and still dirty on the back side only. The quarter in the Vinegar still came out dirty and not clean on both sides. The coin in Coke still had dirt on both sides and was not clean at all. The coin in the Orange Juice came out clean on both sides. The coin in the Tap Water was not cleaned at all and still had dirt on both sides of the coin. Conclusions: I believe my experiment demonstrated that Apple Cider Vinegar cleaned all but one coin better than bleach but not as well as coke. The top 2 best coin cleaning solutions that I had used for this experiment were the Vinegar and the Coke in this demonstration experiment. However, I believe that if the coins were left in each solution for a longer period or overnight the coins and results may have been different for the outcome of this experiment. The effort put into this experiment does not take much but about 10 mins. to set up for the experiment, 10 mins. to demonstrate the experiment and probably another 5 or so mins. to clean up afterward. Do the copper pennies get cleaner than the other coins? I would say no that the Nickels got cleaner than the other coins. The reliability of testing this experiment out is believable and may be repeatable as you perform this experiment you may want to switch it up and use different liquid solutions of your own idea to test out as when you do the results may vary depending on the liquid solutions you may try. In this experiment the Dependent Variable (DV) is the cleanness of each coin present. And the Independent Variable (IV) is the different types of liquid solutions you used for this experiment. The control variable is the tap water used in this experiment. During this experiment I have proven my hypothesis to be wrong: I had thought that out of all the Acid and Base liquid solutions used I thought that the cola would clean the coins the best because the cola seems to clean everything else from toilets, showers, car battery cables because of the acid it contains. This experiment has proven that the best liquid cleaning solution was the acid liquid solution of vinegar
Purchase answer to see full attachment