Question

Two half-cell reactions are given below. What is the voltage of the cell?

• A. +2.03 V
• B. -2.03 V
• C. +2.17V
• D. -2.17V

Answer 1

Answer:

C. +2.17V

Understanding Electrochemical Cells and Cell Potential

The voltage of an electrochemical cell, also known as the cell potential (E_cell), is determined by the difference in the reduction potentials of the two half-cells involved. It represents the driving force for the redox reaction to occur spontaneously.

• The cell potential (E_cell) can be calculated using the following formula:

E_cell = E°_cathode - E°_anode

Where:

• E°_cathode is the standard reduction potential of the cathode (where reduction occurs).

• E°_anode is the standard reduction potential of the anode (where oxidation occurs).

• Alternatively, if you consider the oxidation half-reaction's potential: E_cell = E°_{reduction half-cell} + E°_{oxidation half-cell}

• _{.34V+2.37V=2.71V}