The rate of an acid-catalyzed reaction in aqueous solution follows the rate equation
r = k[X+][Y2-][H+]
If k16 and k4 are rate constants for the reaction at ionic strength of 16 mol L-1 and 4 mol L-1, respectively, \(\ln \frac{k_4}{k_{16}}\), in terms of Debye-Hückel constant (B = 0.51), is
1
4B
2
8B
3
10B
4
12B