Question

U could be 0++ slightly due monitor, or concentrations that were not liom, cell putu 2. (Part II) Use the Nernst equation to calcula Use the Nernst equation to calculate the theoretical value of E of the copper-concentration cell and compare this value with the cell potential that you measured. ESE

Answer 1

E = E˚ - log Q [Equation 1]

In the above equation, E˚ is equal to 0 because each cell is composed of the same element. The value of n, which is moles of electrons, is equal to 2. The values of F and R, which are constants, are 96485 C and 8.314 J/mol-K respectively. The value of Q is equal to the concentration of the diluted solution over the concentration of the more concentrated solution. Using this information, Equation 1 can be rearranged as shown below.

E = - log(0.9143)

E = 0.0389 J

The theoretical value of E of the copper concentrated cell was 0.0389 J, which is very close to our experimental value of 0.039 J. The difference between these two is either zero or immeasurable due to a lack of enough sig figs in our experimental value. Therefore, our theoretical and experimental values are incredibly precise in regard to one another.