practice+problems+for+final

practice+problems+for+final - Chem 1C Practice problems for...

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Chem 1C – Practice problems for the final exam McKeachie Spring 07 1. Rechargeable nickel-cadmium galvanic cells are used in calculators and other battery powered devices. The Telstar communication satellite also uses this type of cell. The unbalanced reaction is as follows: NiO 2 + Cd Ni(OH) 2 + Cd(OH) 2 Balance the reaction in basic solution, and calculate E cell ˚ knowing the following unbalanced standard reduction potentials: N i O 2 + 2e - Ni(OH) 2 E ˚ = 0.49 V C d ( O H ) 2 + 2e - Cd E ˚ = -0.81 V 2. Sketch and calculate the voltage produced by the following electrochemical cells. Your sketch should label the anode, cathode, material composing each electrode, solution composition at each, salt bridge, and direction of electron flow. a) Al(s) | Al 3+ (1.0 M) || Ag + (1.0 M) | Ag(s) b) Pt(s) | Br 2 (g) | Br - (1.0 M) || Cl - (1.0 M) | Cl 2 (g) (1.0 atm) | Pt(s) 3. How much work (in kJ/mol) must be done in order to force F - to reduce Br 2 (g)? 4. What is the equilibrium constant for the following reaction at 298 K? Mn(s) + Cd
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This note was uploaded on 04/25/2008 for the course CHEM 1C taught by Professor Staff during the Spring '01 term at UC Irvine.

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practice+problems+for+final - Chem 1C Practice problems for...

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