Determine the number of uncompensated ions (both total number and as a

Question

percentage of the bulk ions) required to establish a charge of 100mV across a
membrane of a spherical cell that is 25 ƒÊm in diameter. Assume that the total number
of ions inside and outside the cell is .5M (or 500 mM)

Recall the capacitance of a patch of membrane is 1 ƒÊF/cm2
Recall that a Farad is the charge (in coulombs) required to establish 1 V of potential, so
the capacitance of a patch of membrane is 10-6 C/ V cm2 .
Also recall that the elemental charge (the coloumbs on 1 ion) is 1.6x10^-19 C