A potential difference exists between the inner and outer su

A potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. If 1.25 × 10-20 J of work is required to eject a positive sodium ion (Na ) from the interior of the cell, what is the magnitude of the potential difference between the inner and outer surfaces of the cell?

v = ?

Solution

work done = charge * potential difference

w = q * V

1.25*10^-20 = 1.6*10^-19*V

V = 0.078125 V