A spreadsheet should be created to calculate the standard electrode potential for the Ag-AgCl electrode.
Activity coefficient of ions can be calculated by Debye-Huckel equation,
Zx − charge on the species X
- ionic strength of the solution
- the effective diameter of the hydrated ion in nanometers.
Ionic strength is defined by the equation,
C1, C2, C3 − molar concentrations of various ions in the solution
Z1, Z2, Z3 − charges on the ions.
For the electrolyte AmBn, the mean activity coefficient is given by
The values obtained in part (a) for the activity coefficients and standard potential should be compared with those of MacInnes and if there are any differences, a possible reason for the discrepancies should be suggested.
The mean, standard deviation, 95 % confidence interval, and other useful statistics for the standard potential of the Ag-AgCl electrode should be found by using descriptive statistics function of Excel.
The analysis results and the quality of the MacInne’s results should be compared and discussed.
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