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An aqueous CdF2 solution is electrolyzed under 1 bar pressure using platinum electrodes. (a) Write the half-reactions predicted to occur at the anode and cathode, based on the standard cell potentials given below. Standard Reduction Potentials (Volts) at 25 °C F2(g) + 2 e-  2 F-(aq) 2.870 O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229 2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828 Cd2+(aq) + 2 e-  Cd(s) -0.403 Half-reaction at anode:     +       +              +       +     Half-reaction at cathode:     +       +              +       +     (b) What is the expected decomposition potential?  V

An aqueous CdF2 solution is electrolyzed under 1 bar pressure using platinum electrodes. (a) Write the half-reactions predicted to occur at the anode and cathode, based on the standard cell potentials given below. Standard Reduction Potentials (Volts) at 25 °C F2(g) + 2 e-  2 F-(aq) 2.870 O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229 2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828 Cd2+(aq) + 2 e-  Cd(s) -0.403 Half-reaction at anode:     +       +              +       +     Half-reaction at cathode:     +       +              +       +     (b) What is the expected decomposition potential?  V

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 18.50QE
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Enter electrons as e-.
  Use smallest possible integer coefficients.  
States are not required. If a box is not needed, leave it blank.


An aqueous CdF2 solution is electrolyzed under 1 bar pressure using platinum electrodes.

(a) Write the half-reactions predicted to occur at the anode and cathode, based on the standard cell potentials given below.

Standard Reduction Potentials (Volts) at 25 °C
F2(g) + 2 e-  2 F-(aq) 2.870
O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229
2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828
Cd2+(aq) + 2 e-  Cd(s) -0.403


Half-reaction at anode:

    +       +              +       +    



Half-reaction at cathode:

    +       +              +       +    



(b) What is the expected decomposition potential?  V

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