Cu²⁺ + 2e^- $\rightarrow$ Cu(s) E° = 0 $\rightarrow$ V(s) E° = -1

question 70

Short Answer

Cu²⁺ + 2e^- $\rightarrow$ Cu(s) E° = 0.34 V
V²⁺ + 2e^- $\rightarrow$ 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 H₂EDTA^2-, resulting in the reaction:
H₂EDTA^2- + V²⁺ VEDTA^2- + 2H⁺
The potential of the cell was monitored to determine the stoichiometric point for the process, which occurred when 500.0 mL of H₂EDTA^2- solution was added. At the stoichiometric point, E_cell was 1.98 V. The solution was buffered at pH 10.00.
A) Calculate E_cell before titration was carried out.
B) Calculate the equilibrium constant K for the titration reaction.
C) Calculate E_cell at the halfway point of titration.

• A) Calculate E_cell before titration was carried out.
• B) Calculate the equilibrium constant K for the titration reaction.
• C) Calculate E_cell at the halfway point of titration.

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Definitions:

Parasympathetic

Relating to the part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Sympathetic

Pertaining to the part of the autonomic nervous system that typically prepares the body for intense physical activity.

Parasympathetic

The part of the autonomic nervous system responsible for conserving energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.

Sympathetic

Pertaining to the part of the autonomic nervous system that prepares the body for action and stress responses.