?How many electrons or protons are transported through the double layer per second for

Chapter 19, Problem E19D.6(a)

(choose chapter or problem)

How many electrons or protons are transported through the double layer per second for each of the electrodes \(\mathrm{Pt}, \mathrm{H}_{2}\left|\mathrm{H}^{+}, \mathrm{Pt}\right| \mathrm{Fe}^{3+}, \mathrm{Fe}^{2+}\) , and \(\mathrm{Pb}, \mathrm{H}_{2} \mid \mathrm{H}^{+}\) when they are at equilibrium at \(25^{\circ} \mathrm{C}\)? Take the area as \(1.0 \mathrm{\ cm}^{2}\) in each case. Estimate the number of times per second a single atom on the surface takes part in an electron transfer event, assuming an electrode atom occupies about \((280 \mathrm{\ pm})^{2}\) of the surface. Refer to Table 19D.1 for the necessary data. Hint: At equilibrium only the exchange current flows.

Text Transcription:

Pt, H_2 | H^+, Pt | Fe^3+, Fe^2+

Pb, H_2 mid H^+

25^circ C

1.0 cm^2

(280 pm)^2