At 37 °C the concentration of Fe3 + inside a cell is 0.092 M and outside is 0.012 M. The cell membrane is permeable to Fe3+. What potential difference in volts would have to exist across the membrane for Fe3 + to be in equilibrium at the stated conditions? Give you answer as the absolute value of the potential difference in volts.

Question

Chemistry

Felicity Yates

16 November, 18:36

At 37 °C the concentration of Fe3 + inside a cell is 0.092 M and outside is 0.012 M. The cell membrane is permeable to Fe3+. What potential difference in volts would have to exist across the membrane for Fe3 + to be in equilibrium at the stated conditions? Give you answer as the absolute value of the potential difference in volts.

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Araceli Riggs · Answer 1

We are given with

T = 37 C

F3 + concentration inside = 0.092 M

Fe3 + concentration outside = 0.012 M

The formula is

E = RT/zF x [X]out/[X]in

When T = 37 C, RT/F = 60 mV

E = 60/3 (0.012/0.092)

E = 2.61 mV