We have used ultrafast kinetic spectroscopies to study the ionic exchange behavior of the fluorescent probe molecule resorufin in a binary solution of n-butyl and tert-butyl alcohol. The resorufin chromophore, an organic anion, is associated with its sodium counterion (NaR) in tert-butyl alcohol and is fully dissociated (R(-)) in n-butyl alcohol. In a binary solution of the two solvents, both the associated and dissociated forms are present, The linear responses of these two species differ significantly, and we can excite and monitor the populations of the two forms of the chromophore selectively. We find that the signals recovered from ground state recovery and spontaneous emission lifetime measurements can be explained quantitatively using a kinetic model that accounts for ionic association and dissociation in both the ground and excited electronic states of the chromophore. The rates of this dissociation are qualitatively similar to protonation and deprotonation times reported for a variety of other polar organic molecules, implying the significant role of a pre-dissociative complex in the equilibrium system.