# Science

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The concentration of k ions inside the nerve cell is about 20 times greater than concentration of these ions outside the nerve cell.what potential difference between outside and inside of the cell would you expect to measure if ths was only due to the concentration difference of potassium ions?

• Bio/Biochem/Chem -

Use the Nernst equation:

E=(RT/zF)ln([K+]o/[K+]i)

• Science -

Mind illustrating how??

• Bio/Biochem/Chem -

Okay, I am assuming that this is at 25ยบ C
R=8.314 J.K-1.mol-1
F=96485 C.mol-1
T=25+273.15
z=+1
[K+]o=1
[K+]i=20

E=(RT/zF)ln([K+]o/[K+]i)

E=(8.314 *298/(1*96485)ln(1/20)

E=61ln(1/20)=-183mV

• Science -

Thank u so much:)

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