Measurements of the emf of cells of the type Ag |AgX (s)| IMX (bl) | Mx Hg | MX (b2) AgX(s) Ag, where Mz Hg denotes an amalgam and the electrolyte is an alkali metal halide dissolved in ethylene glycol, have been reported (U.
Sen, J Chem. Sac. Faraday Trans. I69, 2006 (1973)) and some values for LiCI are given below. Estimate the activity coefficient at the concentration marked * and then use this value to calculate activity coefficients from the measured cell potential at the other concentrations. Base your answer on the following version of the extended Debye-Huckel law:
log y = - Al1/2/1-Bl1/2 + KJ
With A = 1.461, B = 1.70, k= 0.20, and I = b/b*. For b2 = 0.09141 mol kg-I:
B1/(mol kg-I) 0.0555 0.09141* 0.1652 0.2171 1.040 1.350
E/V -0.0220 0.0000 0.0263 0.0379 0.1156 0.1336