A galvanic cell is constructed with a standard Fe/Fe²⁺ couple in one compartment and a modified hydrogen electrode in the second compartment. The pressure of hydrogen gas is 1.0 atm, but [H⁺] in the second compartment is unknown. What is the pH of the solution in the second compartment if the measured potential in the cell is 0.17 V at $25 ^ { \circ } \mathrm { C }$ ?

Question

Quizplus · Accepted Answer

The Nernst equation can be used to calculate the pH of the solution in the second compartment. Given the measured cell potential and the standard conditions, the equation can be rearranged to solve for the hydrogen ion concentration, which can then be converted to pH.

A Galvanic Cell Is Constructed with a Standard Fe/Fe2+ Couple 25∘C25 ^ { \circ } \mathrm { C }25∘C

A Galvanic Cell Is Constructed with a Standard Fe/Fe²⁺ Couple $25 ^ { \circ } \mathrm { C }$