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Question

for a Cu2+/Cu+ electrochemical couple with a diffusion coefficient for the electrochemically

active species as 10^-5 cm2/s, a bulk concentration of 2 mol/L, a Nernst diffusion layer of 10 μm

and a current density of 0.5 A/cm2 at 25 °C, what is the theoretical mass transfer overpotential?

A) -0.67 mV

B) -6.66 mV

C) -7.71 mV

D) 14.21 mV

Points Earned:

Correct Answer(s): C

0.0/4.0

Fig: 1