Chem 1BL - E11 - Tables - Bert Mouler TA Brendan Beahm...

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Bert Mouler TA: Brendan Beahm Chemistry 1BL – Experiment 11 – Data Tables & Graphs Part 1: STANDARD REDUCTION POTENTIALS AT 298K Half-reaction E (volts) Referenced to the Hydrogen Electrode E (volts) Referenced to the Silver Electrode E (volts) Referenced to the Copper Electrode Ag + + e - Ag (s) 0.80 0.0 0.412 Cu 2+ + 2 e - Cu (s) 0.34 -0.408 0.0 2 H + + 2 e - H 2 (g) 0.0 Not measured Not measured Fe 2+ + 2 e - Fe (s) -0.41 -0.600 -0.730 Zn 2+ + 2 e - Zn (s) -0.76 -1.301 -0.900 Part 2: This reaction is exothermic. It bubbles and the Aluminum is being plate by the copper and is turning reddish-brown. The final precipitate is has a jelly- like texture. Cu 2+ + 2 e - Cu (s) Al (s) Al 3+ + 3 e - Total reaction: 3 Cu 2+ + 2 Al 3 Al 3+ + 3 Cu E cell = 2.04 V Part 3:
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Bert Mouler TA: Brendan Beahm This reaction is mildly endothermic. Turns blueish green and looks fuzzy at the final observation. Ag + + e - Ag (s) Cu (s) Cu 2+ + 2 e - Total reaction: Cu + 2 Ag + Cu 2+ + 2 Ag E cell = 0.46 V Part 4: Data: Faraday’s Constant and Avogadro’s Number
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