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Post-Lab Questions 1 In what way did the mass of the key and the copper strip change? Explain how this happened using your knowledge of electroplating The mass of the key slightly increased, whereas the mass of the copper strip slightly decreased. This happened the ) because the copper strip acted as the anode and the ions were breaking Therefore, the key gained miss from the addition of last 2 Calculate the amperage of the current used to electroplate the copper onto the key the copper strip Cost mass from the release of ons, 12 3 What changes could you make to the procedure to increase the amount of copper that is coating the key? Explain the reasons why these changes would work. 4 Compare your observations of the electrolysis of pure deionized water and the sodium sulfate solution 5 What is the purpose of the universal indicator solution in this procedure? 407 CHAPTER 12 trochem
EEU 12.2 Section Date Data Analysis and Calculations PART A Electroplating of Copper TABLE 12.2 Masses Before and After Electroplating Mass Before Electroplating (8) Mass After Electroplating (8) Кеу 12.53 g 12.549 g 9.08 9 Copper Strip 9.07 g First 10 mase the color is getting 1 Observations of the electroplating process: the copper is getting lighter and shinies. It looks as cleaned. Smells like burning metal.