Standard potential of lead

It is of interest to note that if the equilibrium constant of the system consisting of two metals and their simple ions could be determined experimentally and the standard potential of one of them were known, the standard potential of the other metal could be evaluated by means of equation (34). This method was actually used to obtain the standard potential of tin recorded in Table XLIX. Finely divided tin and lead were shaken with a solution containing lead and tin perchlorates until equilibrium was attained the ratio of the concentrations of lead and stannous ions in the solution was then determined by analysis. The standard potential of lead being known, that of tin could be calculated. 

The Standard Potential of Lead. Carmody80 has studied cells of the type... 

The Standard Potential of Tin. Direct determinations of the standard potential of tin are of doubtful accuracy. The potential can however be readily computed from the standard potential of lead and a knowledge of the equilibrium... 

For electrorefining the standard potential of lead at each electrode will be the same and the equilibrium voltage (at zero current) between the two lead electrodes is therefore zero. In practice it is desired to transfer lead from the anode to the cathode and a current will flow, giving a potential drop across the solution path between the two electrodes as well as overpotentials at each electrode. This will define the starting voltage for a refining cell. 

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See also in sourсe #XX -- [ ]

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