4C — Electrochemistry & Circuits

How is standard cell potential calculated from electrode potentials?

$E_{\text{cell}}^{\circ }=E_{\text{cathode}}^{\circ }-E_{\text{anode}}^{\circ }$.

What does a positive $E_{\text{cell}}^{\circ }$ tell you about a cell, and how is it related to $\Delta G^{\circ }$?

The cell is galvanic and spontaneous; $\Delta G^{\circ }=-nF{E}^{\circ }$.

Why is a biological membrane modeled as a capacitor?

It acts as a dielectric capacitor separating charge across the membrane.

What mainly produces the resting membrane potential near $-70\mathrm{mV}$?

High ${\mathrm{K}}^{+}$ permeability plus the ${\mathrm{Na}}^{+}/{\mathrm{K}}^{+}$ pump.