How to Calculate the Cell Potential for Concentration Cells – Part 1

In battery technology, a concentration cell is a limited form of a galvanic cell that has two equivalent half-cells of the same composition differing only in concentrations.


According to Le Chatelier’s principle, the reduction is more likely to occur at higher concentration and oxidation at lower concentration.

Question:

Consider the voltaic cell made up from two Cu2+(aq)/Cu half-cells made from two Copper sulfate solutions of different concentrations. Calculate the cell potential when [Cu2+(aq)] is 0.00100 M & [Cu2+(aq)] = 0.100 M at 25 °C.

Solution:



Click to enlarge the image

E = Cell potential, EѲ = Standard cell potential, n = Number of electrons in the balanced half-cell equation, Q = Reaction quotient

Got it❓ Let Chemaficionado know at mychemistryhomework@gmail.com❗

References:
(1)    Concentration cell. Wikipedia. https://en.wikipedia.org/wiki/Concentration_cell.
(2)    Wikipedia Contributors. Nernst equation. Wikipedia. https://en.wikipedia.org/wiki/Nernst_equation.

(3)    Brown, C.; Ford, M. Higher Level Chemistry, 2nd ed.; Pearson Education: Harlow, Essex, 2014.

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