1. Calculate the limiting local current density of the Cu-Zn pair (Sk=Sa) in 0.5 M (3%) NaCl solution at 20 C and the concentration polarization of the anode in the case when ik=iA= 10-3 A/cm2. The solubility of oxygen in 0.5 M NaCl at t = 20 °C is 2.25×10-7 mol/cm3; DO2=1.95*10-5 cm2/s. Take the effective thickness of the diffusion layer to be 0.075 cm.

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