Problem: A voltaic cell is based on Ag+(aq)/Ag(s) and Fe3+(aq)/Fe2+(aq) half-cells.What is the standard emf of the cell?

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We are being asked to determine the standard emf of the voltaic cell, E°cell, based on Ag+(aq)/Ag(s) and Fe3+(aq)/Fe2+(aq) half-cells.


The standard emf of a cell, E°cell, can be calculated using the following equation:

E°cell = E°cathode - E°anode


We are not given the balanced reaction of the voltaic cell so we will do the following steps:

Step 1. Write the two half-cell reactions and determine the half-cell potentials (refer to the Standard Reduction Potential Table)
Step 2. Identify the reduction half-reaction (cathode) and the oxidation half-reaction (anode)
Step 3. Balance the reaction by adding the oxidation half-reaction and reduction half-reaction.
Step 4. Calculate E°cell.


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Problem Details

A voltaic cell is based on Ag+(aq)/Ag(s) and Fe3+(aq)/Fe2+(aq) half-cells.

What is the standard emf of the cell?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Cell Potential concept. If you need more Cell Potential practice, you can also practice Cell Potential practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Barker Jr.'s class at Augusta State University.