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Cu2+ + 2e- → Cu(s) E° = 0

Question 85

Short Answer

Cu2+ + 2e- → Cu(s) E° = 0.34 V
V2+ + 2e- → V(s) E° = -1.20 V
In a galvanic cell, the copper compartment contains a copper electrode and [Cu2+] = 1.00 M. The vanadium compartment contains a vanadium electrode and V2+ at an unknown concentration. The compartment containing the vanadium (1.00 L of solution) was titrated with 0.0800 M H2EDTA2-, resulting in the reaction:
H2EDTA2- + V2+ Cu<sup>2+</sup> + 2e<sup>-</sup> → Cu(s) E° = 0.34 V V<sup>2+</sup> + 2e<sup>-</sup> → V(s) E° = -1.20 V In a galvanic cell, the copper compartment contains a copper electrode and [Cu<sup>2+</sup>] = 1.00 M. The vanadium compartment contains a vanadium electrode and V<sup>2+</sup> at an unknown concentration. The compartment containing the vanadium (1.00 L of solution) was titrated with 0.0800 M H<sub>2</sub>EDTA<sup>2-</sup>, resulting in the reaction: H<sub>2</sub>EDTA<sup>2-</sup> + V<sup>2+</sup>  VEDTA<sup>2-</sup> + 2H<sup>+</sup><sup> </sup><sup> </sup>The potential of the cell was monitored to determine the stoichiometric point for the process, which occurred when 500.0 mL of H<sub>2</sub>EDTA<sup>2-</sup> solution was added. At the stoichiometric point, E<sub>cell</sub> was 1.98 V. The solution was buffered at pH 10.00.A. Calculate E<sub>cell</sub> before titration was carried out.B. Calculate the equilibrium constant K for the titration reaction.C. Calculate E<sub>cell</sub> at the halfway point of titration. VEDTA2- + 2H+

The potential of the cell was monitored to determine the stoichiometric point for the process, which occurred when 500.0 mL of H2EDTA2- solution was added. At the stoichiometric point, Ecell was 1.98 V. The solution was buffered at pH 10.00.A. Calculate Ecell before titration was carried out.B. Calculate the equilibrium constant K for the titration reaction.C. Calculate Ecell at the halfway point of titration.

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A. 1.58 V;...

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