Chem2 hw10 - Yoon Seong Meen – Homework 10 – Due 11:00...

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Yoon, Seong Meen – Homework 10 – Due: Nov 21 2007, 11:00 pm – Inst: James Holcombe 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points Calculate the potential For the cell indicated: ±e | ±e 2+ (10 - 3 M) || Pb 2+ (10 - 5 M) | Pb Pb 2+ + 2 e - Pb E 0 = - 0 . 126 V ±e 2+ + 2 e - ±e E 0 = - 0 . 440 V 1. 0.373 V 2. 0.255 V 3. 0.196 V 4. 0.284 V 5. 0.432 V 002 (part 1 oF 1) 10 points An evil scientist has created a lightening weapon to destroy the entire world unless they give him a herring (a fsh) and a very nice shrubbery. As a power source, he has created a Fuel cell that he thinks will run on protons (H + ) and ²uorine molecules (± 2 ). (He cre- ates them and holds them in special magnetic bottles made oF superconductive material.) Given the standard reduction potentials 2H + + 2 e - H 2 E = 0.00 2 + 2 e - ± - E = 2.87 will his power source work? 1. Choose me! Choose me! 2. Nope. He’s a deFective evil genius. There is no H 2 to be oxidized. 3. Yes. The E cell is positive so he will have plenty oF power to run his weapon. 4. M R ducks! M R not! M R 2! 5. Ni! Ni! Ni! 003 (part 1 oF 1) 10 points You turn on a ²ashlight containing brand new NiCad batteries and keep it lit For a minute or two. Which oF the Following can be considered TRUE regarding the chemical state oF these batteries? I. Δ G For the battery reaction is negative. II. E cell > 0. III. The batteries are at equilibrium. IV.
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This note was uploaded on 05/14/2009 for the course CH 53575 taught by Professor Hackert during the Spring '09 term at University of Texas.

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Chem2 hw10 - Yoon Seong Meen – Homework 10 – Due 11:00...

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