When an ion-selective electrode for X was immersed in 0.0680 M XCl, the measured potential was...
When an ion-selective electrode for X was immersed in 0.0680 M XCl, the measured potential was 0.0220 V. What is the concentration of X when the potential is 0.0370 V? Assume that the electrode follows the Nernst equation, the temperature is at 25
Homework Answers
case 1
concentration 0.0680 M
potential 0.0220 V
using nernest equation
E=E�?RTlnQ/nF
z for cl = -1
r =8.314 J.K-1.mol-1
on putting all values in the equation
we get
concentration of X in intracellular fluid is
Q out is 0.0680 M
so Q in is 28.881019879498897
or 28.9 moles
reference http://www.physiologyweb.com/calculators/nernst_potential_calculator.html
now moving to next part
now Veq is 0.0370 V
Q in is 28.9 moles
Q out ( concentration of) 0.122
t= + 298.15k
activity coefficient = 1.
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