Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
A voltaic cell is assembled with Pb(s) and Pb(NO3)2(aq) in one compartment and Zn(s) and ZnCl2(aq) in the other. An external wire connects the two electrodes, and a salt bridge containing KNO3(aq) connects the two solutions.
(a) In the product-favored reaction, zinc metal is oxidized to Zn2+. Write a balanced net ionic equation for this reaction.
(b) Which half-reaction occurs at each electrode? Which is the anode and which is the cathode?
(c) Draw a diagram of the cell, indicating the direction of electron flow outside the cell and of ion flow within the cell.
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