Geometrical factors in the capacity of the electrical double layer

A method for determination of double layer capacities at silver iodide-solution interfaces is presented. The influence of counterion on capacity is subjected to special study in the present work. Capacities at the silver iodide interface are compared with those at the mercury interface (Grahame) and interpreted in terms of theGouy-Stern double layer model. Some characteristic differences between capacities at mercury and silver iodide interfaces are explained in terms of different structural factors.