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An aqueous ScCl3 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 Cl2(g) + 2 e-  2 Cl-(aq) 1.360 O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229 2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828 Sc3+(aq) + 3 e-  Sc(s) -2.080 Half-reaction at anode:     +       +       -->       +       +     Half-reaction at cathode:     +       +       -->       +       +     (b) What is the expected decomposition potential?  ________V

An aqueous ScCl3 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 Cl2(g) + 2 e-  2 Cl-(aq) 1.360 O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229 2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828 Sc3+(aq) + 3 e-  Sc(s) -2.080 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 18.103QE
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An aqueous ScCl3 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
Cl2(g) + 2 e-  2 Cl-(aq) 1.360
O2(g) + 4 H3O+(aq) + 4 e-  6 H2O(l) 1.229
2 H2O(l) + 2 e-  H2(g) + 2 OH-(aq) -0.828
Sc3+(aq) + 3 e-  Sc(s) -2.080


Half-reaction at anode:

    +       +       -->       +       +    



Half-reaction at cathode:

    +       +       -->       +       +    



(b) What is the expected decomposition potential?  ________V

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