  We reply to remarks by Lang and Horanyi on the meaning of the notion of
"electrosorption valency" used in I. Abou Hamad et al., Electrochim. Acta 50
(2005) 5518. It is concluded that, contrary to the assertion of Lang and
Horanyi, the magnitude of the current in the external circuit upon adsorption
of an ion of charge ze with partial charge transfer is indeed given by an
electrosorption valency gamma such that |gamma e| < |ze|. We believe the
conclusion of Lang and Horanyi to the contrary is the result of an excessively
severe charge-neutrality requirement.
