A simple and physically clear approach to the interaction of intense chirped pulses with large molecules in solutions is developed: time-dependent rate equations for integral populations of electronic molecular states For weak interaction, the time-dependent transition rates have a form of the Marcus electron-transfer rate. For larger interactions, the transition rates take into account the saturation effect similar to the transition rates in the solvent-controlled theory of electron-transfer reactions. The developed theory is a good approximation to a more sophisticated treatment (J. Chem. Phys. 1998, 109, 4523) which reproduces the effects observed in recent chirped pulse experiments.