Question

A potential difference of 128mV esists between the inner and cuter surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is recuired to eject a positive sodium ion (Ha' ') from the interiar of the cell?

Answer 1

The work required to eject a positive sodium ion from the interior of a cell can be calculated using the formula: Work = Charge x Potential Difference.

Step-by-step explanation:

The work required to eject a positive sodium ion from the interior of a cell can be determined using the formula:

Work = Charge x Potential Difference

The charge of a sodium ion is 1.6 x 10^-19 C, and the potential difference across the cell membrane is 128 mV. Therefore, the work required is:

Work = (1.6 x 10^-19 C) x (128 x 10^-3 V)

Work = 2.048 x 10^-20 J