Electrochemical characterization of the Au(110) face in aqueous solutions using cyclic voltammetry and differential capacity-potential measurements was found to be consistent with in-situ structural observations by surface X-ray scattering and scanning tunneling microscopy. The structural changes of the Au(110) surface in the double-layer range of potential and their kinetics make determination of the potential of zero charge of the 1 x 1 structure difficult; the observation of the potential of zero charge for a reconstructed structure is ambiguous.