To calculate the exchange current density at the Zinc electrode, we will use the Butler-Volmer equation, which relates the current density i to the electrode potential E and the standard electrode potential E0 .The Butler-Volmer equation is given by:i = i0 * exp * n * F * E - E0 / R * T - exp - * n * F * E - E0 / R * T where:i0 = exchange current density = transfer coefficient 0.5 n = number of electrons transferred in the reaction for Zinc, n = 2 F = Faraday's constant 96485 C/mol E = electrode potential 1.5 V E0 = standard electrode potential for Zinc -0.76 V R = gas constant 8.314 J/mol K T = temperature assuming room temperature, T = 298 K First, we need to find the overpotential which is the difference between the electrode potential E and the standard electrode potential E0 : = E - E0 = 1.5 V - -0.76 V = 2.26 VNow, we can rewrite the Butler-Volmer equation in terms of overpotential:i = i0 * exp * n * F * / R * T - exp - * n * F * / R * T We need to find the exchange current density i0 . To do this, we can use the Tafel equation, which relates the exchange current density to the concentration of the species involved in the reaction:i0 = A * c^n where:A = a constant depends on the electrode material and the reaction c = concentration of Zinc ion 0.1 M n = number of electrons transferred in the reaction 2 Unfortunately, we don't have enough information to determine the value of A. However, if we had the value of A, we could calculate i0 and then use the Butler-Volmer equation to find the current density i at the Zinc electrode.