The Electrolysis of Acid Solutions of Copper Sulphate

Abstract

81 use the term "limiting current" to indicate the greatest current that under the conditions of the experiment liberates copper only.

Fiftieth Anniversary: Diffusion and Convection in Electrolysis—A Theoretical Review

“…This result is identical to equation [14] indicating that for small vta cell of finite length can be treated as a semi-infinite column of electrolyte. The foregoing equations have been found to agree fairly well with experimental findings (8,9) for the deposition of a metal with the cathode placed horizontally at the top of the cell. In these experiments natural convection was suppressed.…”

“…If one makes the assumption that ~t is independent of the rate of diffusion, the concentration at the interface, c~-, can be related to the current density by combining equations [7] and [8],…”

“…A fiat infinite disk rotating with a constant angular velocity.-Using yon Karman's solution for the hydrodynamics of fluid motion about such a rotating disk the following result was obtained for steady state conditions in the discharge of one ion of a binary system: where: 6 = diffusion layer thickness (equation [6]); D = effective diffusion coefficient fro" the salt; v = kinematic viscosity of the fluid; and Z = number of revolutions per second. Thus for ", system 4 with D = 10 -s cm2/sec and v = 10 -= Cln2/sec 0 00647 Using the above value for 6, equations [8] and [11] may be utilized to give limiting currents or concentr'~tion polarization. Equivalent expressions are presented by Levich. Flow past a fiat electrode set into a landnar flow of liquid.--Levich developed a general theory of the laminar boundary layer by considering the analogy of the convective diffusion equation:…”