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Chemistry Solved_Part_47 - Week 27 Mass of Iron object...

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©2010 Digital Interactive Video Education Week 27 140 Mass of Iron object before electroplating =____________________g Mass of Iron object after electroplating =_____________________g Results: How many grams of Copper were plated onto the Iron object? _________________g Cu How many moles of Copper were plated onto the Iron object? Given: Faraday’s number: 96,485 Coulombs = 1 mole of electrons; 1 Amp = 1 Coulomb/second Cu 2+ + 2e - → Cu(s) # coulombs during electroplating = area under curve of graph x (1000 mA/1 Amp) _____________________moles electrons Time (seconds) Current (mA) 200 400 600 800 1000 1200 110 90 70 50 30 10 time (seconds) Current (mA)
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©2010 Digital Interactive Video Education Week 27 141 Calculate the atomic mass of Cu: ____________________g Cu/mole Discussion 1. Was your hypothesis correct? Calculate % error. 2. List at least three sources of error. 3. Considering the question answered in this experiment, list some similar questions that could be answered by conducting a science experiment.
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©2010 Digital Interactive Video Education Week 28 142 LESSON 52: ORGANIC CHEMISTRY, HYDROCARBONS Assignment: 1) Read textbook pages corresponding to this topic 2)
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