A voltaic cell is constructed in which the anode is a Mg|Mg2+ half cell and the cathode is a Cd|Cd2+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) The anode reaction is:     +              +     The cathode reaction is:

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter19: Principles Of Chemical Reactivity: Electron Transfer Reactions
Section19.2: Simple Voltaic Cells
Problem 19.3CYU: Describe how to set up a voltaic cell using the following half-reactions: Reduction...
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A voltaic cell is constructed in which the anode is a Mg|Mg2+ half cell and the cathode is a Cd|Cd2+ half cell. The half-cell compartments are connected by a salt bridge.

(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)

The anode reaction is:

    +              +    



The cathode reaction is:

    +              +    



The net cell reaction is:

    +              +    



In the external circuit, electrons migrate 

 

 the Cd|Cd2+ electrode 

 

 the Mg|Mg2+ electrode.

In the salt bridge, anions migrate 

 

 the Cd|Cd2+ compartment 

 

 the Mg|Mg2+ compartment.

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