The hanging meniscus rotating disk (HMRD) is a configuration in which a cylinder of the electrode material is mounted without an insulating shroud. Despite the differences in the hydrodynamic boundaries introduced because of the meniscus of electrolyte that rises above the general surface level, the hydrodynamic behavior of the HMRD is similar to that of conventional rotating disks and it can also be used to study the kinetics of simple charge transfer reactions. In this paper, the current-rotation rate equations for a chemical reaction in equilibrium that precedes the charge transfer reaction at the HMRD are developed. The applicability of the HMRD to the study of the kinetics of chemical reactions in equilibrium in the bulk electrolyte is discussed.