Question & Answer: A concentration cell is built based on the following half reactions by using two pieces of gold as…..

A concentration cell is built based on the following half reactions by using two pieces of gold as electrodes, two Au³⁺ solutions, 0.125 M and 0.431 M, and all other materials needed for a galvanic cell. What will the potential of this cell be when the cathode concentration of Au³⁺ has changed by 0.035 M at 281 K?

Au³⁺ + 3 e^– → Au     E^o = 1.50 V