Chamber A and B are seperated by a semi-permeable membrane. Chamber A contains 2.1 M NaCl and chamber B contains 9.5 M NaCl. If Na+ is in equilibrium across the membrane, what is the electrical potential differene? What side of the membrane is electrically positive?

 

Nernst Equation for sodium

 

E(Na) = 61/(1) log 145mM/ 15mM = 60.1 mV

 

1 is valence

 

145 extracellular concentration

 

15 intracellular concentration

 

Any help would be appreciated

Which part of this is the question, and which part (if any) is your attempt ?

 

Where do these cellular concentrations come from, and what relevance do they have to the described galvanic cell ?

 

And where on earth did the 61 come from ?

 

The solution to this problem (if the question ends at the word "positive") is a direct application of the Nernst Equation. All you have to do is plug in the given numbers and you are through. But I have no idea what all the stuff in the second half of the post is about.