the Answer is (A)
15. For the given electrochemical cell at 298.15 K: Pt|H2(g, f= 1...
15. For the given electrochemical cell at 298.15 K: Pt|H2(g, f= 1 atm)|HCl(aq, m) |AgCl) |Ago) The following figure is obtained from derivation of the Nernst equation at different molalities of HCl : 0.235 y = 0.223 +0.06x 80.230 – Ecent (2RT/F) In(m/mº) 0.225 0.220 + 0.0 0.1 0.2 (m/m9) 12 (2RT) The figure shows the plot of (Ecell + F In (m/m°)) vs (m/mº)1/2 . Calculate the experimental mean activity coefficient V+ of HCl at m= 0.200 mol kg when the cell potential Ecell is 0.320 V at this concentration. A) 0.757 B) 0.995 0.810 0.516 E) 0.618