Question

Calculate the standard electrode potential of copper electrode if the Cu2+ ion concentration is 1.0 M and the electrode is at 25°C. The half-cell reaction is Cu2+(aq) + 2e- → Cu(s).

Answer 1

To calculate the standard electrode potential of the copper electrode, we can use the Nernst equation:E = E -  RT/nF  * lnQWhere:E = electrode potentialE = standard electrode potential  for Cu2+/Cu, E = +0.34 V R = gas constant  8.314 J/molK T = temperature in Kelvin  25C = 298 K n = number of electrons transferred  for Cu2+/Cu, n = 2 F = Faraday's constant  96485 C/mol Q = reaction quotient, which is the ratio of the concentrations of the products to the reactants raised to their stoichiometric coefficientsSince the Cu2+ ion concentration is 1.0 M, and the reaction quotient  Q  for this half-cell reaction is [Cu2+], we can plug in the values:E = 0.34 V -  8.314 J/molK * 298 K  /  2 * 96485 C/mol  * ln 1.0 E = 0.34 V -  0.000043 J/C  * 0E = 0.34 VThe standard electrode potential of the copper electrode under these conditions is 0.34 V.