Question

Calculate the standard electrode potential for a redox reaction involving the reaction of iron (Fe) with copper (Cu) ions, given the following half-reactions: Fe2+ + 2e- → FeCu2+ + 2e- → Cu (Note: The standard electrode potential values for Cu2+/Cu and Fe2+/Fe half-cells at 25°C are 0.34V and -0.44V, respectively.)

Answer 1

To calculate the standard electrode potential for the redox reaction, we need to combine the two half-reactions and find the difference in their standard electrode potentials.The overall redox reaction can be written as:Fe + Cu2+  Fe2+ + CuNow, we can use the standard electrode potential values given for the Cu2+/Cu and Fe2+/Fe half-cells:E Cu2+/Cu  = 0.34 VE Fe2+/Fe  = -0.44 VThe standard electrode potential for the overall redox reaction  Ecell  can be calculated using the following equation:Ecell = E cathode  - E anode In this case, the Cu2+/Cu half-cell acts as the cathode  reduction  and the Fe2+/Fe half-cell acts as the anode  oxidation . Therefore, we can plug in the values:Ecell = 0.34 V -  -0.44 V  = 0.34 V + 0.44 V = 0.78 VSo, the standard electrode potential for the redox reaction involving the reaction of iron with copper ions is 0.78 V.