Hittorf electrolysis mechanism

Hittorf electrolysis mechanism for the case that the electrodes are of the metal whose cation is that of the electrolyte in solution. 

Figure 4.8 shows the Hittorf mechanism of electrolysis when using electrodes made of the metal whose cations are those of the electrolyte in solution and when 1 faraday is passed. It is seen that the concentration of the electrolyte in the central portion of the cell remains unchanged at the end of the electrolysis. Let us consider in some detail what happens in the cathode region. By the cathode reaction M cations are discharged... 

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