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Chem 10: Electrochemistry Worksheet 2 Writing cell (line diagrams) and getting E'au A. Consider an electrochemical cell constructed from the following half cells, linked by an external circuit and by a KC salt bridge an Al(s) electrode in 1.0 M AI(NO₂), solution • a Pb(s) electrode in 1.0 M Pb(NO); solution 1. Write a half reaction for the first half cell (A/A(NO)). What is E 1/2 CU 2. Write a half reaction for the second half cell (Pb/Pb(NO). What is E 1/2 cu 3a. Write the combined cell reaction (a.k.a redox reaction) 3b. Identify the oxidizing and reducing agents 4. Pick Al/A(NO) to be the anode and (Pb/Pb(NO) as the cathode. What is Ecu? 5. What does the sign of E' cu convey? 6. Now reverse the half cells. What does the sign of E' ctul convey? 7. Which arrangement gives useful work"? How can you tell? 8. Write out the LINE diagram for 7. above. 9. Sketch the entire cell! 10. Which electrode gains mass and which electrode loses mass?
A. Consider an electrochemical cell constructed from the following half cells, linked by an external circut and by a KCI salt bridge *an Al(s) electrode in 1.0M AI(NO3)3 solution * a Pb(s) electrode in 1.0M Pb(NO3)2 solution a. write a half reaction for the first half cell (AI/AI(NO3)3). What is Eocell? b. write a half reaction for the second half cell (Pb/Pb(NO3)2). what is Eocell? c. write the combined cell reaction. (aka redox rxn) d. identify oxidizing & reducing agents e. Pick (AI/AI(NO3)3) to be the anode and (Pb/Pb(NO3)2) as the cathode. What is the Eocell? f. What does the sign of EOcell convey? g. Now reverse the half cells, what does the sign of EOcell convey? h. Which arrangement gives "useful work"? How can you tell? i. Write out a line diagram for above. j. sketch the entire cell k. which electrode gains mass & which electrode loses mass?