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Unformatted text preview: 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: Faradays 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) 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. 2010 Digital Interactive Video Education...
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This document was uploaded on 10/31/2011 for the course CHM 2046 at University of Florida.
- Spring '07