10.7: Chapter 10 Problems
An underlined problem number or problem-part letter indicates that the numerical answer appears in Appendix I.
10.1
The mean ionic activity coefficient of NaCl in a 0.100 molal aqueous solution at \(298.15\K\) has been evaluated with measurements of equilibrium cell potentials, with the result \(\ln\g_{\pm}=-0.2505\) (R. A. Robinson and R. H. Stokes,
Electrolyte Solutions
, 2nd edition, Butterworths, London, 1959, Table 9.3). Use this value in Eq. 10.6.9, together with the values of osmotic coefficients in Table 10.1, to evaluate \(\g_{\pm}\) at each of the molalities shown in the table; then plot \(\g_{\pm}\) as a function of \(m\B\).